64708789 has 2 divisors, whose sum is σ = 64708790. Its totient is φ = 64708788.

The previous prime is 64708769. The next prime is 64708807. The reversal of 64708789 is 98780746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62331025 + 2377764 = 7895^2 + 1542^2 .

It is a cyclic number.

It is not a de Polignac number, because 64708789 - 2²³ = 56320181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64708769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32354394 + 32354395.

It is an arithmetic number, because the mean of its divisors is an integer number (32354395).

Almost surely, 2^64708789 is an apocalyptic number.

It is an amenable number.

64708789 is a deficient number, since it is larger than the sum of its proper divisors (1).

64708789 is an equidigital number, since it uses as much as digits as its factorization.

64708789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 64708789 is about 8044.1773351910. The cubic root of 64708789 is about 401.4712258519.

The spelling of 64708789 in words is "sixty-four million, seven hundred eight thousand, seven hundred eighty-nine".