64712381 has 2 divisors, whose sum is σ = 64712382. Its totient is φ = 64712380.

The previous prime is 64712341. The next prime is 64712393. The reversal of 64712381 is 18321746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49928356 + 14784025 = 7066^2 + 3845^2 .

It is a cyclic number.

It is not a de Polignac number, because 64712381 - 2²² = 60518077 is a prime.

It is a super-2 number, since 2×64712381² = 8375384509378322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64712341) 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, 32356190 + 32356191.

It is an arithmetic number, because the mean of its divisors is an integer number (32356191).

Almost surely, 2^64712381 is an apocalyptic number.

It is an amenable number.

64712381 is a deficient number, since it is larger than the sum of its proper divisors (1).

64712381 is an equidigital number, since it uses as much as digits as its factorization.

64712381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 64712381 is about 8044.4005991746. The cubic root of 64712381 is about 401.4786543016.

The spelling of 64712381 in words is "sixty-four million, seven hundred twelve thousand, three hundred eighty-one".