77324161 has 4 divisors (see below), whose sum is σ = 78634800. Its totient is φ = 76013524.

The previous prime is 77324147. The next prime is 77324189. The reversal of 77324161 is 16142377.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77324161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77324111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655231 + ... + 655348.

It is an arithmetic number, because the mean of its divisors is an integer number (19658700).

Almost surely, 2^77324161 is an apocalyptic number.

It is an amenable number.

77324161 is a deficient number, since it is larger than the sum of its proper divisors (1310639).

77324161 is a wasteful number, since it uses less digits than its factorization.

77324161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310638.

The product of its digits is 7056, while the sum is 31.

The square root of 77324161 is about 8793.4157754538. The cubic root of 77324161 is about 426.0282571424.

The spelling of 77324161 in words is "seventy-seven million, three hundred twenty-four thousand, one hundred sixty-one".