40745997 has 32 divisors (see below), whose sum is σ = 63185920. Its totient is φ = 26244000.

The previous prime is 40745981. The next prime is 40746007. The reversal of 40745997 is 79954704.

It is not a de Polignac number, because 40745997 - 2⁴ = 40745981 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 (40745927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67497 + ... + 68097.

It is an arithmetic number, because the mean of its divisors is an integer number (1974560).

Almost surely, 2^40745997 is an apocalyptic number.

It is an amenable number.

40745997 is a deficient number, since it is larger than the sum of its proper divisors (22439923).

40745997 is an frugal number, since it uses more digits than its factorization.

40745997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 40745997 is about 6383.2591205434. The cubic root of 40745997 is about 344.1081691786.

The spelling of 40745997 in words is "forty million, seven hundred forty-five thousand, nine hundred ninety-seven".