40297897 has 4 divisors (see below), whose sum is σ = 40384656. Its totient is φ = 40211140.

The previous prime is 40297891. The next prime is 40297903. The reversal of 40297897 is 79879204.

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 an interprime number because it is at equal distance from previous prime (40297891) and next prime (40297903).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40297897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40297891) 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, 42679 + ... + 43612.

It is an arithmetic number, because the mean of its divisors is an integer number (10096164).

Almost surely, 2^40297897 is an apocalyptic number.

It is an amenable number.

40297897 is a deficient number, since it is larger than the sum of its proper divisors (86759).

40297897 is an equidigital number, since it uses as much as digits as its factorization.

40297897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86758.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 40297897 is about 6348.0624603102. The cubic root of 40297897 is about 342.8420849124.

The spelling of 40297897 in words is "forty million, two hundred ninety-seven thousand, eight hundred ninety-seven".