77899226 has 4 divisors (see below), whose sum is σ = 116848842. Its totient is φ = 38949612.

The previous prime is 77899207. The next prime is 77899231. The reversal of 77899226 is 62299877.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 52548001 + 25351225 = 7249^2 + 5035^2 .

It is a super-2 number, since 2×77899226² = 12136578822798152, which contains 22 as substring.

It is an unprimeable number.

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, 19474805 + ... + 19474808.

Almost surely, 2^77899226 is an apocalyptic number.

77899226 is a deficient number, since it is larger than the sum of its proper divisors (38949616).

77899226 is a wasteful number, since it uses less digits than its factorization.

77899226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38949615.

The product of its digits is 762048, while the sum is 50.

The square root of 77899226 is about 8826.0538181001. The cubic root of 77899226 is about 427.0817833540.

It can be divided in two parts, 77899 and 226, that added together give a 7-th power (78125 = 5⁷).

The spelling of 77899226 in words is "seventy-seven million, eight hundred ninety-nine thousand, two hundred twenty-six".