64911397 has 4 divisors (see below), whose sum is σ = 65300256. Its totient is φ = 64522540.

The previous prime is 64911383. The next prime is 64911421. The reversal of 64911397 is 79311946.

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 64911397 - 2²³ = 56522789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64911337) 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, 194179 + ... + 194512.

It is an arithmetic number, because the mean of its divisors is an integer number (16325064).

Almost surely, 2^64911397 is an apocalyptic number.

It is an amenable number.

64911397 is a deficient number, since it is larger than the sum of its proper divisors (388859).

64911397 is a wasteful number, since it uses less digits than its factorization.

64911397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388858.

The product of its digits is 40824, while the sum is 40.

The square root of 64911397 is about 8056.7609496621. The cubic root of 64911397 is about 401.8898013167.

The spelling of 64911397 in words is "sixty-four million, nine hundred eleven thousand, three hundred ninety-seven".