70639057 has 2 divisors, whose sum is σ = 70639058. Its totient is φ = 70639056.

The previous prime is 70639043. The next prime is 70639091. The reversal of 70639057 is 75093607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69906321 + 732736 = 8361^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 70639057 - 2⁷ = 70638929 is a prime.

It is not a weakly prime, because it can be changed into another prime (70639027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35319528 + 35319529.

It is an arithmetic number, because the mean of its divisors is an integer number (35319529).

Almost surely, 2^70639057 is an apocalyptic number.

It is an amenable number.

70639057 is a deficient number, since it is larger than the sum of its proper divisors (1).

70639057 is an equidigital number, since it uses as much as digits as its factorization.

70639057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 37.

The square root of 70639057 is about 8404.7044564339. The cubic root of 70639057 is about 413.3788927553.

The spelling of 70639057 in words is "seventy million, six hundred thirty-nine thousand, fifty-seven".