64682971 has 2 divisors, whose sum is σ = 64682972. Its totient is φ = 64682970.

The previous prime is 64682929. The next prime is 64682983. The reversal of 64682971 is 17928646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64682971 - 2¹⁹ = 64158683 is a prime.

It is not a weakly prime, because it can be changed into another prime (64682921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32341485 + 32341486.

It is an arithmetic number, because the mean of its divisors is an integer number (32341486).

Almost surely, 2^64682971 is an apocalyptic number.

64682971 is a deficient number, since it is larger than the sum of its proper divisors (1).

64682971 is an equidigital number, since it uses as much as digits as its factorization.

64682971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 64682971 is about 8042.5724118593. The cubic root of 64682971 is about 401.4178247447.

The spelling of 64682971 in words is "sixty-four million, six hundred eighty-two thousand, nine hundred seventy-one".