40912817 has 4 divisors (see below), whose sum is σ = 44632176. Its totient is φ = 37193460.

The previous prime is 40912801. The next prime is 40912819. The reversal of 40912817 is 71821904.

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 40912817 - 2⁴ = 40912801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40912819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859663 + ... + 1859684.

It is an arithmetic number, because the mean of its divisors is an integer number (11158044).

Almost surely, 2^40912817 is an apocalyptic number.

It is an amenable number.

40912817 is a deficient number, since it is larger than the sum of its proper divisors (3719359).

40912817 is a wasteful number, since it uses less digits than its factorization.

40912817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719358.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 40912817 is about 6396.3127659613. The cubic root of 40912817 is about 344.5771392733.

The spelling of 40912817 in words is "forty million, nine hundred twelve thousand, eight hundred seventeen".