77149827 has 12 divisors (see below), whose sum is σ = 115566360. Its totient is φ = 51433056.

The previous prime is 77149817. The next prime is 77149837. The reversal of 77149827 is 72894177.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77149817) and next prime (77149837).

It is not a de Polignac number, because 77149827 - 2⁸ = 77149571 is a prime.

It is a super-2 number, since 2×77149827² = 11904191612259858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77149817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158502 + ... + 158987.

It is an arithmetic number, because the mean of its divisors is an integer number (9630530).

Almost surely, 2^77149827 is an apocalyptic number.

77149827 is a deficient number, since it is larger than the sum of its proper divisors (38416533).

77149827 is an equidigital number, since it uses as much as digits as its factorization.

77149827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317504 (or 317492 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 77149827 is about 8783.4974241472. The cubic root of 77149827 is about 425.7078437202.

The spelling of 77149827 in words is "seventy-seven million, one hundred forty-nine thousand, eight hundred twenty-seven".