64900397 has 2 divisors, whose sum is σ = 64900398. Its totient is φ = 64900396.

The previous prime is 64900343. The next prime is 64900399. The reversal of 64900397 is 79300946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64818601 + 81796 = 8051^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 64900397 - 2⁸ = 64900141 is a prime.

Together with 64900399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64900397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64900399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32450198 + 32450199.

It is an arithmetic number, because the mean of its divisors is an integer number (32450199).

Almost surely, 2^64900397 is an apocalyptic number.

It is an amenable number.

64900397 is a deficient number, since it is larger than the sum of its proper divisors (1).

64900397 is an equidigital number, since it uses as much as digits as its factorization.

64900397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 64900397 is about 8056.0782642673. The cubic root of 64900397 is about 401.8670983824.

The spelling of 64900397 in words is "sixty-four million, nine hundred thousand, three hundred ninety-seven".