77051889 has 6 divisors (see below), whose sum is σ = 111297186. Its totient is φ = 51367920.

The previous prime is 77051873. The next prime is 77051929. The reversal of 77051889 is 98815077.

It can be written as a sum of positive squares in only one way, i.e., 75690000 + 1361889 = 8700^2 + 1167^2 .

It is not a de Polignac number, because 77051889 - 2⁴ = 77051873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77051389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4280652 + ... + 4280669.

It is an arithmetic number, because the mean of its divisors is an integer number (18549531).

Almost surely, 2^77051889 is an apocalyptic number.

It is an amenable number.

77051889 is a deficient number, since it is larger than the sum of its proper divisors (34245297).

77051889 is a wasteful number, since it uses less digits than its factorization.

77051889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561327 (or 8561324 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 77051889 is about 8777.9205396267. The cubic root of 77051889 is about 425.5276288867.

The spelling of 77051889 in words is "seventy-seven million, fifty-one thousand, eight hundred eighty-nine".