79381947 has 24 divisors (see below), whose sum is σ = 112460544. Its totient is φ = 49711024.

The previous prime is 79381931. The next prime is 79381949. The reversal of 79381947 is 74918397.

It is not a de Polignac number, because 79381947 - 2⁴ = 79381931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79381896 and 79381905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79381949) 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, 475258 + ... + 475424.

It is an arithmetic number, because the mean of its divisors is an integer number (4685856).

Almost surely, 2^79381947 is an apocalyptic number.

79381947 is a deficient number, since it is larger than the sum of its proper divisors (33078597).

79381947 is a wasteful number, since it uses less digits than its factorization.

79381947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 276 counting only the distinct ones).

The product of its digits is 381024, while the sum is 48.

The square root of 79381947 is about 8909.6547071141. The cubic root of 79381947 is about 429.7744391189.

The spelling of 79381947 in words is "seventy-nine million, three hundred eighty-one thousand, nine hundred forty-seven".