70712657 has 4 divisors (see below), whose sum is σ = 70776420. Its totient is φ = 70648896.

The previous prime is 70712627. The next prime is 70712669. The reversal of 70712657 is 75621707.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9388096 + 61324561 = 3064^2 + 7831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70712657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70712617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30188 + ... + 32445.

It is an arithmetic number, because the mean of its divisors is an integer number (17694105).

Almost surely, 2^70712657 is an apocalyptic number.

It is an amenable number.

70712657 is a deficient number, since it is larger than the sum of its proper divisors (63763).

70712657 is a wasteful number, since it uses less digits than its factorization.

70712657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63762.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 70712657 is about 8409.0818167027. The cubic root of 70712657 is about 413.5224116868.

The spelling of 70712657 in words is "seventy million, seven hundred twelve thousand, six hundred fifty-seven".