79089381 has 36 divisors (see below), whose sum is σ = 139900800. Its totient is φ = 42810768.

The previous prime is 79089379. The next prime is 79089383. The reversal of 79089381 is 18398097.

It is an interprime number because it is at equal distance from previous prime (79089379) and next prime (79089383).

It is not a de Polignac number, because 79089381 - 2¹ = 79089379 is a prime.

It is a super-2 number, since 2×79089381² = 12510260373926322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79089383) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3660 + ... + 13098.

Almost surely, 2^79089381 is an apocalyptic number.

It is an amenable number.

79089381 is a deficient number, since it is larger than the sum of its proper divisors (60811419).

79089381 is a wasteful number, since it uses less digits than its factorization.

79089381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9478 (or 9468 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 79089381 is about 8893.2210700061. The cubic root of 79089381 is about 429.2458043315.

The spelling of 79089381 in words is "seventy-nine million, eighty-nine thousand, three hundred eighty-one".