64761929 has 2 divisors, whose sum is σ = 64761930. Its totient is φ = 64761928.

The previous prime is 64761923. The next prime is 64761943. The reversal of 64761929 is 92916746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 200704 = 8035^2 + 448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64761929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64761929.

It is not a weakly prime, because it can be changed into another prime (64761923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32380964 + 32380965.

It is an arithmetic number, because the mean of its divisors is an integer number (32380965).

Almost surely, 2^64761929 is an apocalyptic number.

It is an amenable number.

64761929 is a deficient number, since it is larger than the sum of its proper divisors (1).

64761929 is an equidigital number, since it uses as much as digits as its factorization.

64761929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 64761929 is about 8047.4796675729. The cubic root of 64761929 is about 401.5810942017.

The spelling of 64761929 in words is "sixty-four million, seven hundred sixty-one thousand, nine hundred twenty-nine".