78976111 has 2 divisors, whose sum is σ = 78976112. Its totient is φ = 78976110.

The previous prime is 78976097. The next prime is 78976123. The reversal of 78976111 is 11167987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78976111 - 2⁷ = 78975983 is a prime.

It is a super-2 number, since 2×78976111² = 12474452217368642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78976511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39488055 + 39488056.

It is an arithmetic number, because the mean of its divisors is an integer number (39488056).

Almost surely, 2^78976111 is an apocalyptic number.

78976111 is a deficient number, since it is larger than the sum of its proper divisors (1).

78976111 is an equidigital number, since it uses as much as digits as its factorization.

78976111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 40.

The square root of 78976111 is about 8886.8504544636. The cubic root of 78976111 is about 429.0407877571.

The spelling of 78976111 in words is "seventy-eight million, nine hundred seventy-six thousand, one hundred eleven".