64570139 has 2 divisors, whose sum is σ = 64570140. Its totient is φ = 64570138.

The previous prime is 64570109. The next prime is 64570157. The reversal of 64570139 is 93107546.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64570139 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64570099 and 64570108.

It is not a weakly prime, because it can be changed into another prime (64570109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32285069 + 32285070.

It is an arithmetic number, because the mean of its divisors is an integer number (32285070).

Almost surely, 2^64570139 is an apocalyptic number.

64570139 is a deficient number, since it is larger than the sum of its proper divisors (1).

64570139 is an equidigital number, since it uses as much as digits as its factorization.

64570139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 64570139 is about 8035.5546790499. The cubic root of 64570139 is about 401.1842798262.

The spelling of 64570139 in words is "sixty-four million, five hundred seventy thousand, one hundred thirty-nine".