64309877 has 2 divisors, whose sum is σ = 64309878. Its totient is φ = 64309876.

The previous prime is 64309807. The next prime is 64309901. The reversal of 64309877 is 77890346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40436881 + 23872996 = 6359^2 + 4886^2 .

It is a cyclic number.

It is not a de Polignac number, because 64309877 - 2¹⁸ = 64047733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64309807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32154938 + 32154939.

It is an arithmetic number, because the mean of its divisors is an integer number (32154939).

Almost surely, 2^64309877 is an apocalyptic number.

It is an amenable number.

64309877 is a deficient number, since it is larger than the sum of its proper divisors (1).

64309877 is an equidigital number, since it uses as much as digits as its factorization.

64309877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 64309877 is about 8019.3439257835. The cubic root of 64309877 is about 400.6445379526.

The spelling of 64309877 in words is "sixty-four million, three hundred nine thousand, eight hundred seventy-seven".