70705439 has 4 divisors (see below), whose sum is σ = 80806224. Its totient is φ = 60604656.

The previous prime is 70705433. The next prime is 70705457. The reversal of 70705439 is 93450707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93450707 = 7 ⋅13350101.

It is not a de Polignac number, because 70705439 - 2²⁰ = 69656863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70705399 and 70705408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70705433) 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, 5050382 + ... + 5050395.

It is an arithmetic number, because the mean of its divisors is an integer number (20201556).

Almost surely, 2^70705439 is an apocalyptic number.

70705439 is a deficient number, since it is larger than the sum of its proper divisors (10100785).

70705439 is a wasteful number, since it uses less digits than its factorization.

70705439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100784.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 70705439 is about 8408.6526269076. The cubic root of 70705439 is about 413.5083410972.

The spelling of 70705439 in words is "seventy million, seven hundred five thousand, four hundred thirty-nine".