79691553 has 8 divisors (see below), whose sum is σ = 118061600. Its totient is φ = 53127684.

The previous prime is 79691551. The next prime is 79691561. The reversal of 79691553 is 35519697.

79691553 is a `hidden beast` number, since 7 + 9 + 6 + 91 + 553 = 666.

It is not a de Polignac number, because 79691553 - 2¹ = 79691551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79691499 and 79691508.

It is not an unprimeable number, because it can be changed into a prime (79691551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475743 + ... + 1475796.

It is an arithmetic number, because the mean of its divisors is an integer number (14757700).

Almost surely, 2^79691553 is an apocalyptic number.

It is an amenable number.

79691553 is a deficient number, since it is larger than the sum of its proper divisors (38370047).

79691553 is a wasteful number, since it uses less digits than its factorization.

79691553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951548 (or 2951542 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 79691553 is about 8927.0125461993. The cubic root of 79691553 is about 430.3324506724.

The spelling of 79691553 in words is "seventy-nine million, six hundred ninety-one thousand, five hundred fifty-three".