77161189 has 4 divisors (see below), whose sum is σ = 88184224. Its totient is φ = 66138156.

The previous prime is 77161187. The next prime is 77161213. The reversal of 77161189 is 98116177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 77161189 - 2¹ = 77161187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77161187) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5511507 + ... + 5511520.

It is an arithmetic number, because the mean of its divisors is an integer number (22046056).

Almost surely, 2^77161189 is an apocalyptic number.

It is an amenable number.

77161189 is a deficient number, since it is larger than the sum of its proper divisors (11023035).

77161189 is a wasteful number, since it uses less digits than its factorization.

77161189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11023034.

The product of its digits is 21168, while the sum is 40.

The square root of 77161189 is about 8784.1441814214. The cubic root of 77161189 is about 425.7287409590.

The spelling of 77161189 in words is "seventy-seven million, one hundred sixty-one thousand, one hundred eighty-nine".