64700729 has 2 divisors, whose sum is σ = 64700730. Its totient is φ = 64700728.

The previous prime is 64700693. The next prime is 64700743. The reversal of 64700729 is 92700746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 14077504 = 7115^2 + 3752^2 .

It is a cyclic number.

It is not a de Polignac number, because 64700729 - 2⁸ = 64700473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64700429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32350364 + 32350365.

It is an arithmetic number, because the mean of its divisors is an integer number (32350365).

Almost surely, 2^64700729 is an apocalyptic number.

It is an amenable number.

64700729 is a deficient number, since it is larger than the sum of its proper divisors (1).

64700729 is an equidigital number, since it uses as much as digits as its factorization.

64700729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 64700729 is about 8043.6763361040. The cubic root of 64700729 is about 401.4545563366.

The spelling of 64700729 in words is "sixty-four million, seven hundred thousand, seven hundred twenty-nine".