40972497 has 4 divisors (see below), whose sum is σ = 54630000. Its totient is φ = 27314996.

The previous prime is 40972471. The next prime is 40972511. The reversal of 40972497 is 79427904.

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 not a de Polignac number, because 40972497 - 2¹² = 40968401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40972697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6828747 + ... + 6828752.

It is an arithmetic number, because the mean of its divisors is an integer number (13657500).

Almost surely, 2^40972497 is an apocalyptic number.

It is an amenable number.

40972497 is a deficient number, since it is larger than the sum of its proper divisors (13657503).

40972497 is a wasteful number, since it uses less digits than its factorization.

40972497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13657502.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 40972497 is about 6400.9762536663. The cubic root of 40972497 is about 344.7446040934.

The spelling of 40972497 in words is "forty million, nine hundred seventy-two thousand, four hundred ninety-seven".