40353997 has 4 divisors (see below), whose sum is σ = 40367836. Its totient is φ = 40340160.

The previous prime is 40353991. The next prime is 40354003. The reversal of 40353997 is 79935304.

40353997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (40353991) and next prime (40354003).

It can be written as a sum of positive squares in 2 ways, for example, as 14891881 + 25462116 = 3859^2 + 5046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40353997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40353991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654 + ... + 9007.

It is an arithmetic number, because the mean of its divisors is an integer number (10091959).

Almost surely, 2^40353997 is an apocalyptic number.

It is an amenable number.

40353997 is a deficient number, since it is larger than the sum of its proper divisors (13839).

40353997 is an equidigital number, since it uses as much as digits as its factorization.

40353997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13838.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 40353997 is about 6352.4795946150. The cubic root of 40353997 is about 343.0011049782.

The spelling of 40353997 in words is "forty million, three hundred fifty-three thousand, nine hundred ninety-seven".