77985227 has 2 divisors, whose sum is σ = 77985228. Its totient is φ = 77985226.

The previous prime is 77985209. The next prime is 77985241. The reversal of 77985227 is 72258977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77985227 - 2⁶ = 77985163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77985287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38992613 + 38992614.

It is an arithmetic number, because the mean of its divisors is an integer number (38992614).

Almost surely, 2^77985227 is an apocalyptic number.

77985227 is a deficient number, since it is larger than the sum of its proper divisors (1).

77985227 is an equidigital number, since it uses as much as digits as its factorization.

77985227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 47.

The square root of 77985227 is about 8830.9244702919. The cubic root of 77985227 is about 427.2388921134.

The spelling of 77985227 in words is "seventy-seven million, nine hundred eighty-five thousand, two hundred twenty-seven".