64475687 has 2 divisors, whose sum is σ = 64475688. Its totient is φ = 64475686.

The previous prime is 64475633. The next prime is 64475701. The reversal of 64475687 is 78657446.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64475687 - 2⁸ = 64475431 is a prime.

It is a super-2 number, since 2×64475687² = 8314228428243938, 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 (64475627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32237843 + 32237844.

It is an arithmetic number, because the mean of its divisors is an integer number (32237844).

Almost surely, 2^64475687 is an apocalyptic number.

64475687 is a deficient number, since it is larger than the sum of its proper divisors (1).

64475687 is an equidigital number, since it uses as much as digits as its factorization.

64475687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 47.

The square root of 64475687 is about 8029.6753981715. The cubic root of 64475687 is about 400.9885693970.

The spelling of 64475687 in words is "sixty-four million, four hundred seventy-five thousand, six hundred eighty-seven".