64999927 has 2 divisors, whose sum is σ = 64999928. Its totient is φ = 64999926.

The previous prime is 64999903. The next prime is 64999939. The reversal of 64999927 is 72999946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64999927 - 2⁷ = 64999799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64999027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32499963 + 32499964.

It is an arithmetic number, because the mean of its divisors is an integer number (32499964).

Almost surely, 2^64999927 is an apocalyptic number.

64999927 is a deficient number, since it is larger than the sum of its proper divisors (1).

64999927 is an equidigital number, since it uses as much as digits as its factorization.

64999927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 55.

The square root of 64999927 is about 8062.2532210295. The cubic root of 64999927 is about 402.0724253394.

It can be divided in two parts, 649 and 99927, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 64999927 in words is "sixty-four million, nine hundred ninety-nine thousand, nine hundred twenty-seven".