78992227 has 2 divisors, whose sum is σ = 78992228. Its totient is φ = 78992226.

The previous prime is 78992213. The next prime is 78992231. The reversal of 78992227 is 72229987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78992227 - 2⁷ = 78992099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78992237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39496113 + 39496114.

It is an arithmetic number, because the mean of its divisors is an integer number (39496114).

Almost surely, 2^78992227 is an apocalyptic number.

78992227 is a deficient number, since it is larger than the sum of its proper divisors (1).

78992227 is an equidigital number, since it uses as much as digits as its factorization.

78992227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 78992227 is about 8887.7571411465. The cubic root of 78992227 is about 429.0699693707.

The spelling of 78992227 in words is "seventy-eight million, nine hundred ninety-two thousand, two hundred twenty-seven".