78979611 has 4 divisors (see below), whose sum is σ = 105306152. Its totient is φ = 52653072.

The previous prime is 78979609. The next prime is 78979613. The reversal of 78979611 is 11697987.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78979609) and next prime (78979613).

It is not a de Polignac number, because 78979611 - 2¹ = 78979609 is a prime.

It is a super-2 number, since 2×78979611² = 12475557907422642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78979613) 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, 13163266 + ... + 13163271.

It is an arithmetic number, because the mean of its divisors is an integer number (26326538).

Almost surely, 2^78979611 is an apocalyptic number.

78979611 is a deficient number, since it is larger than the sum of its proper divisors (26326541).

78979611 is a wasteful number, since it uses less digits than its factorization.

78979611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26326540.

The product of its digits is 190512, while the sum is 48.

The square root of 78979611 is about 8887.0473724404. The cubic root of 78979611 is about 429.0471256254.

The spelling of 78979611 in words is "seventy-eight million, nine hundred seventy-nine thousand, six hundred eleven".