64642829 has 2 divisors, whose sum is σ = 64642830. Its totient is φ = 64642828.

The previous prime is 64642771. The next prime is 64642931. The reversal of 64642829 is 92824646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 13520329 = 7150^2 + 3677^2 .

It is a cyclic number.

It is not a de Polignac number, because 64642829 - 2²⁴ = 47865613 is a prime.

It is a super-2 number, since 2×64642829² = 8357390682246482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64642729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32321414 + 32321415.

It is an arithmetic number, because the mean of its divisors is an integer number (32321415).

Almost surely, 2^64642829 is an apocalyptic number.

It is an amenable number.

64642829 is a deficient number, since it is larger than the sum of its proper divisors (1).

64642829 is an equidigital number, since it uses as much as digits as its factorization.

64642829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 64642829 is about 8040.0764299850. The cubic root of 64642829 is about 401.3347681143.

The spelling of 64642829 in words is "sixty-four million, six hundred forty-two thousand, eight hundred twenty-nine".