77196189 has 16 divisors (see below), whose sum is σ = 118848128. Its totient is φ = 43656192.

The previous prime is 77196179. The next prime is 77196191. The reversal of 77196189 is 98169177.

It is a happy number.

It is not a de Polignac number, because 77196189 - 2¹⁵ = 77163421 is a prime.

It is a super-2 number, since 2×77196189² = 11918503192247442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77196139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16912 + ... + 20985.

It is an arithmetic number, because the mean of its divisors is an integer number (7428008).

Almost surely, 2^77196189 is an apocalyptic number.

It is an amenable number.

77196189 is a deficient number, since it is larger than the sum of its proper divisors (41651939).

77196189 is a wasteful number, since it uses less digits than its factorization.

77196189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38004.

The product of its digits is 190512, while the sum is 48.

The square root of 77196189 is about 8786.1361815078. The cubic root of 77196189 is about 425.7931008346.

The spelling of 77196189 in words is "seventy-seven million, one hundred ninety-six thousand, one hundred eighty-nine".