79146991 has 8 divisors (see below), whose sum is σ = 98676864. Its totient is φ = 61672920.

The previous prime is 79146973. The next prime is 79147007. The reversal of 79146991 is 19964197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79146991 - 2¹¹ = 79144943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79146911) 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, 513865 + ... + 514018.

It is an arithmetic number, because the mean of its divisors is an integer number (12334608).

Almost surely, 2^79146991 is an apocalyptic number.

79146991 is a deficient number, since it is larger than the sum of its proper divisors (19529873).

79146991 is a wasteful number, since it uses less digits than its factorization.

79146991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027901.

The product of its digits is 122472, while the sum is 46.

The square root of 79146991 is about 8896.4594643038. The cubic root of 79146991 is about 429.3500022596.

The spelling of 79146991 in words is "seventy-nine million, one hundred forty-six thousand, nine hundred ninety-one".