64865407 has 2 divisors, whose sum is σ = 64865408. Its totient is φ = 64865406.

The previous prime is 64865363. The next prime is 64865419. The reversal of 64865407 is 70456846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64865407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64865407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64865467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32432703 + 32432704.

It is an arithmetic number, because the mean of its divisors is an integer number (32432704).

Almost surely, 2^64865407 is an apocalyptic number.

64865407 is a deficient number, since it is larger than the sum of its proper divisors (1).

64865407 is an equidigital number, since it uses as much as digits as its factorization.

64865407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 64865407 is about 8053.9063192962. The cubic root of 64865407 is about 401.7948653496.

The spelling of 64865407 in words is "sixty-four million, eight hundred sixty-five thousand, four hundred seven".