79947587 has 4 divisors (see below), whose sum is σ = 79980840. Its totient is φ = 79914336.

The previous prime is 79947557. The next prime is 79947601. The reversal of 79947587 is 78574997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78574997 = 523 ⋅150239.

It is a cyclic number.

It is not a de Polignac number, because 79947587 - 2⁶ = 79947523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79947557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12713 + ... + 17930.

It is an arithmetic number, because the mean of its divisors is an integer number (19995210).

Almost surely, 2^79947587 is an apocalyptic number.

79947587 is a deficient number, since it is larger than the sum of its proper divisors (33253).

79947587 is a wasteful number, since it uses less digits than its factorization.

79947587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33252.

The product of its digits is 4445280, while the sum is 56.

The square root of 79947587 is about 8941.3414541667. The cubic root of 79947587 is about 430.7928171274.

The spelling of 79947587 in words is "seventy-nine million, nine hundred forty-seven thousand, five hundred eighty-seven".