40897591 has 8 divisors (see below), whose sum is σ = 46783904. Its totient is φ = 35022240.

The previous prime is 40897501. The next prime is 40897607. The reversal of 40897591 is 19579804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40897591 - 2²⁵ = 7343159 is a prime.

It is a super-2 number, since 2×40897591² = 3345225899206562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40897501) 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 7 ways as a sum of consecutive naturals, for example, 8161 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (5847988).

Almost surely, 2^40897591 is an apocalyptic number.

40897591 is a deficient number, since it is larger than the sum of its proper divisors (5886313).

40897591 is a wasteful number, since it uses less digits than its factorization.

40897591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 40897591 is about 6395.1224382337. The cubic root of 40897591 is about 344.5343883468.

The spelling of 40897591 in words is "forty million, eight hundred ninety-seven thousand, five hundred ninety-one".