70517279 has 4 divisors (see below), whose sum is σ = 80591184. Its totient is φ = 60443376.

The previous prime is 70517273. The next prime is 70517329. The reversal of 70517279 is 97271507.

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

It is not a de Polignac number, because 70517279 - 2²⁰ = 69468703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70517273) 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, 5036942 + ... + 5036955.

It is an arithmetic number, because the mean of its divisors is an integer number (20147796).

Almost surely, 2^70517279 is an apocalyptic number.

70517279 is a deficient number, since it is larger than the sum of its proper divisors (10073905).

70517279 is a wasteful number, since it uses less digits than its factorization.

70517279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10073904.

The product of its (nonzero) digits is 30870, while the sum is 38.

The square root of 70517279 is about 8397.4566983105. The cubic root of 70517279 is about 413.1412083317.

The spelling of 70517279 in words is "seventy million, five hundred seventeen thousand, two hundred seventy-nine".