77115249 has 12 divisors (see below), whose sum is σ = 111750912. Its totient is φ = 51243000.

The previous prime is 77115209. The next prime is 77115257. The reversal of 77115249 is 94251177.

It is a happy number.

It is not a de Polignac number, because 77115249 - 2⁷ = 77115121 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77115209) 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, 10977 + ... + 16574.

It is an arithmetic number, because the mean of its divisors is an integer number (9312576).

Almost surely, 2^77115249 is an apocalyptic number.

It is an amenable number.

77115249 is a deficient number, since it is larger than the sum of its proper divisors (34635663).

77115249 is a wasteful number, since it uses less digits than its factorization.

77115249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27868 (or 27865 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 77115249 is about 8781.5288532237. The cubic root of 77115249 is about 425.6442344804.

The spelling of 77115249 in words is "seventy-seven million, one hundred fifteen thousand, two hundred forty-nine".