70640379 has 24 divisors (see below), whose sum is σ = 104354432. Its totient is φ = 46033920.

The previous prime is 70640359. The next prime is 70640399. The reversal of 70640379 is 97304607.

70640379 is a `hidden beast` number, since 7 + 0 + 640 + 3 + 7 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (70640359) and next prime (70640399).

It is not a de Polignac number, because 70640379 - 2⁹ = 70639867 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70640359) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122139 + ... + 122715.

Almost surely, 2^70640379 is an apocalyptic number.

70640379 is a deficient number, since it is larger than the sum of its proper divisors (33714053).

70640379 is a wasteful number, since it uses less digits than its factorization.

70640379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 70640379 is about 8404.7831024959. The cubic root of 70640379 is about 413.3814715151.

The spelling of 70640379 in words is "seventy million, six hundred forty thousand, three hundred seventy-nine".