70839979 has 8 divisors (see below), whose sum is σ = 81012960. Its totient is φ = 60680256.

The previous prime is 70839949. The next prime is 70839983. The reversal of 70839979 is 97993807.

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

It is not a de Polignac number, because 70839979 - 2⁷ = 70839851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70839949) 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, 14637 + ... + 18865.

It is an arithmetic number, because the mean of its divisors is an integer number (10126620).

Almost surely, 2^70839979 is an apocalyptic number.

70839979 is a deficient number, since it is larger than the sum of its proper divisors (10172981).

70839979 is a wasteful number, since it uses less digits than its factorization.

70839979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 70839979 is about 8416.6489174730. The cubic root of 70839979 is about 413.7704527696.

The spelling of 70839979 in words is "seventy million, eight hundred thirty-nine thousand, nine hundred seventy-nine".