70439565 has 16 divisors (see below), whose sum is σ = 128803968. Its totient is φ = 32200896.

The previous prime is 70439563. The next prime is 70439573. The reversal of 70439565 is 56593407.

It is not a de Polignac number, because 70439565 - 2¹ = 70439563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70439563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335322 + ... + 335531.

It is an arithmetic number, because the mean of its divisors is an integer number (8050248).

Almost surely, 2^70439565 is an apocalyptic number.

It is an amenable number.

70439565 is a deficient number, since it is larger than the sum of its proper divisors (58364403).

70439565 is a wasteful number, since it uses less digits than its factorization.

70439565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670868.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 70439565 is about 8392.8281883999. The cubic root of 70439565 is about 412.9893842773.

The spelling of 70439565 in words is "seventy million, four hundred thirty-nine thousand, five hundred sixty-five".