40331997 has 6 divisors (see below), whose sum is σ = 58257342. Its totient is φ = 26887992.

The previous prime is 40331983. The next prime is 40331999. The reversal of 40331997 is 79913304.

It can be written as a sum of positive squares in only one way, i.e., 23242041 + 17089956 = 4821^2 + 4134^2 .

It is not a de Polignac number, because 40331997 - 2⁴ = 40331981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40331999) 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, 2240658 + ... + 2240675.

It is an arithmetic number, because the mean of its divisors is an integer number (9709557).

Almost surely, 2^40331997 is an apocalyptic number.

It is an amenable number.

40331997 is a deficient number, since it is larger than the sum of its proper divisors (17925345).

40331997 is a wasteful number, since it uses less digits than its factorization.

40331997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481339 (or 4481336 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 40331997 is about 6350.7477512495. The cubic root of 40331997 is about 342.9387617443.

It can be divided in two parts, 40331 and 997, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 40331997 in words is "forty million, three hundred thirty-one thousand, nine hundred ninety-seven".