64331671 has 2 divisors, whose sum is σ = 64331672. Its totient is φ = 64331670.

The previous prime is 64331639. The next prime is 64331677. The reversal of 64331671 is 17613346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64331671 - 2⁵ = 64331639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64331677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32165835 + 32165836.

It is an arithmetic number, because the mean of its divisors is an integer number (32165836).

Almost surely, 2^64331671 is an apocalyptic number.

64331671 is a deficient number, since it is larger than the sum of its proper divisors (1).

64331671 is an equidigital number, since it uses as much as digits as its factorization.

64331671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 64331671 is about 8020.7026500176. The cubic root of 64331671 is about 400.6897910370.

The spelling of 64331671 in words is "sixty-four million, three hundred thirty-one thousand, six hundred seventy-one".