70069939 has 4 divisors (see below), whose sum is σ = 70095256. Its totient is φ = 70044624.

The previous prime is 70069931. The next prime is 70069949. The reversal of 70069939 is 93996007.

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

It is a cyclic number.

It is not a de Polignac number, because 70069939 - 2³ = 70069931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70069895 and 70069904.

It is not an unprimeable number, because it can be changed into a prime (70069931) 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, 7914 + ... + 14239.

It is an arithmetic number, because the mean of its divisors is an integer number (17523814).

Almost surely, 2^70069939 is an apocalyptic number.

70069939 is a deficient number, since it is larger than the sum of its proper divisors (25317).

70069939 is a wasteful number, since it uses less digits than its factorization.

70069939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25316.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 70069939 is about 8370.7788765443. The cubic root of 70069939 is about 412.2657407571.

The spelling of 70069939 in words is "seventy million, sixty-nine thousand, nine hundred thirty-nine".