70439761 has 4 divisors (see below), whose sum is σ = 80502592. Its totient is φ = 60376932.

The previous prime is 70439741. The next prime is 70439767. The reversal of 70439761 is 16793407.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16793407 = 29 ⋅579083.

It is not a de Polignac number, because 70439761 - 2⁵ = 70439729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70439761.

It is not an unprimeable number, because it can be changed into a prime (70439767) 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, 5031405 + ... + 5031418.

It is an arithmetic number, because the mean of its divisors is an integer number (20125648).

Almost surely, 2^70439761 is an apocalyptic number.

It is an amenable number.

70439761 is a deficient number, since it is larger than the sum of its proper divisors (10062831).

70439761 is a wasteful number, since it uses less digits than its factorization.

70439761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062830.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 70439761 is about 8392.8398650278. The cubic root of 70439761 is about 412.9897673283.

The spelling of 70439761 in words is "seventy million, four hundred thirty-nine thousand, seven hundred sixty-one".