64877231 has 2 divisors, whose sum is σ = 64877232. Its totient is φ = 64877230.

The previous prime is 64877213. The next prime is 64877233. The reversal of 64877231 is 13277846.

Together with previous prime (64877213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64877231 - 2¹⁴ = 64860847 is a prime.

It is a super-2 number, since 2×64877231² = 8418110204454722, which contains 22 as substring.

Together with 64877233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64877233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32438615 + 32438616.

It is an arithmetic number, because the mean of its divisors is an integer number (32438616).

Almost surely, 2^64877231 is an apocalyptic number.

64877231 is a deficient number, since it is larger than the sum of its proper divisors (1).

64877231 is an equidigital number, since it uses as much as digits as its factorization.

64877231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 64877231 is about 8054.6403395807. The cubic root of 64877231 is about 401.8192776112.

The spelling of 64877231 in words is "sixty-four million, eight hundred seventy-seven thousand, two hundred thirty-one".