70139517 has 8 divisors (see below), whose sum is σ = 106879296. Its totient is φ = 40079712.

The previous prime is 70139513. The next prime is 70139591. The reversal of 70139517 is 71593107.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70139517 - 2² = 70139513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70139513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1669968 + ... + 1670009.

It is an arithmetic number, because the mean of its divisors is an integer number (13359912).

Almost surely, 2^70139517 is an apocalyptic number.

It is an amenable number.

70139517 is a deficient number, since it is larger than the sum of its proper divisors (36739779).

70139517 is a wasteful number, since it uses less digits than its factorization.

70139517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339987.

The product of its (nonzero) digits is 6615, while the sum is 33.

The square root of 70139517 is about 8374.9338504850. The cubic root of 70139517 is about 412.4021527332.

The spelling of 70139517 in words is "seventy million, one hundred thirty-nine thousand, five hundred seventeen".