64097881 has 4 divisors (see below), whose sum is σ = 64433664. Its totient is φ = 63762100.

The previous prime is 64097857. The next prime is 64097899. The reversal of 64097881 is 18879046.

64097881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64097881 - 2¹³ = 64089689 is a prime.

It is a super-2 number, since 2×64097881² = 8217076697380322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64097081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167605 + ... + 167986.

It is an arithmetic number, because the mean of its divisors is an integer number (16108416).

Almost surely, 2^64097881 is an apocalyptic number.

It is an amenable number.

64097881 is a deficient number, since it is larger than the sum of its proper divisors (335783).

64097881 is a wasteful number, since it uses less digits than its factorization.

64097881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335782.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 64097881 is about 8006.1152252513. The cubic root of 64097881 is about 400.2038148811.

The spelling of 64097881 in words is "sixty-four million, ninety-seven thousand, eight hundred eighty-one".