64709897 has 8 divisors (see below), whose sum is σ = 74996352. Its totient is φ = 54684000.

The previous prime is 64709867. The next prime is 64709899. The reversal of 64709897 is 79890746.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-64709897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64709899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64604 + ... + 65597.

It is an arithmetic number, because the mean of its divisors is an integer number (9374544).

Almost surely, 2^64709897 is an apocalyptic number.

It is an amenable number.

64709897 is a deficient number, since it is larger than the sum of its proper divisors (10286455).

64709897 is a wasteful number, since it uses less digits than its factorization.

64709897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130279.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 64709897 is about 8044.2462045862. The cubic root of 64709897 is about 401.4735172850.

The spelling of 64709897 in words is "sixty-four million, seven hundred nine thousand, eight hundred ninety-seven".