77226857 has 2 divisors, whose sum is σ = 77226858. Its totient is φ = 77226856.

The previous prime is 77226829. The next prime is 77226899. The reversal of 77226857 is 75862277.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 35093776 = 6491^2 + 5924^2 .

It is a cyclic number.

It is not a de Polignac number, because 77226857 - 2⁸ = 77226601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77226817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38613428 + 38613429.

It is an arithmetic number, because the mean of its divisors is an integer number (38613429).

Almost surely, 2^77226857 is an apocalyptic number.

It is an amenable number.

77226857 is a deficient number, since it is larger than the sum of its proper divisors (1).

77226857 is an equidigital number, since it uses as much as digits as its factorization.

77226857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 44.

The square root of 77226857 is about 8787.8812577322. The cubic root of 77226857 is about 425.8494788076.

The spelling of 77226857 in words is "seventy-seven million, two hundred twenty-six thousand, eight hundred fifty-seven".