40003957 has 4 divisors (see below), whose sum is σ = 45718816. Its totient is φ = 34289100.

The previous prime is 40003939. The next prime is 40003961. The reversal of 40003957 is 75930004.

40003957 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40003957 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 (40003937) 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, 2857419 + ... + 2857432.

It is an arithmetic number, because the mean of its divisors is an integer number (11429704).

Almost surely, 2^40003957 is an apocalyptic number.

It is an amenable number.

40003957 is a deficient number, since it is larger than the sum of its proper divisors (5714859).

40003957 is an equidigital number, since it uses as much as digits as its factorization.

40003957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714858.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 40003957 is about 6324.8681409180. The cubic root of 40003957 is about 342.0064662549.

The spelling of 40003957 in words is "forty million, three thousand, nine hundred fifty-seven".