40972397 has 6 divisors (see below), whose sum is σ = 43524618. Its totient is φ = 38561984.

The previous prime is 40972279. The next prime is 40972403. The reversal of 40972397 is 79327904.

It can be written as a sum of positive squares in 3 ways, for example, as 8185321 + 32787076 = 2861^2 + 5726^2 .

It is not a de Polignac number, because 40972397 - 2²⁴ = 24195181 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 (40972697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70598 + ... + 71175.

It is an arithmetic number, because the mean of its divisors is an integer number (7254103).

Almost surely, 2^40972397 is an apocalyptic number.

It is an amenable number.

40972397 is a deficient number, since it is larger than the sum of its proper divisors (2552221).

40972397 is a wasteful number, since it uses less digits than its factorization.

40972397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141807 (or 141790 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 40972397 is about 6400.9684423531. The cubic root of 40972397 is about 344.7443236248.

The spelling of 40972397 in words is "forty million, nine hundred seventy-two thousand, three hundred ninety-seven".