40351997 has 8 divisors (see below), whose sum is σ = 46359552. Its totient is φ = 34405200.

The previous prime is 40351979. The next prime is 40352041. The reversal of 40351997 is 79915304.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40351997 - 2⁶ = 40351933 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 40351997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40351907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13754 + ... + 16427.

It is an arithmetic number, because the mean of its divisors is an integer number (5794944).

Almost surely, 2^40351997 is an apocalyptic number.

It is an amenable number.

40351997 is a deficient number, since it is larger than the sum of its proper divisors (6007555).

40351997 is a wasteful number, since it uses less digits than its factorization.

40351997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30379.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 40351997 is about 6352.3221738196. The cubic root of 40351997 is about 342.9954383479.

The spelling of 40351997 in words is "forty million, three hundred fifty-one thousand, nine hundred ninety-seven".