64810397 has 4 divisors (see below), whose sum is σ = 64830816. Its totient is φ = 64789980.

The previous prime is 64810393. The next prime is 64810441. The reversal of 64810397 is 79301846.

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 64810397 - 2² = 64810393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64810397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64810393) 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, 4313 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (16207704).

Almost surely, 2^64810397 is an apocalyptic number.

It is an amenable number.

64810397 is a deficient number, since it is larger than the sum of its proper divisors (20419).

64810397 is a wasteful number, since it uses less digits than its factorization.

64810397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20418.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 64810397 is about 8050.4904819520. The cubic root of 64810397 is about 401.6812506733.

The spelling of 64810397 in words is "sixty-four million, eight hundred ten thousand, three hundred ninety-seven".