77613361 has 4 divisors (see below), whose sum is σ = 88700992. Its totient is φ = 66525732.

The previous prime is 77613353. The next prime is 77613397. The reversal of 77613361 is 16331677.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16331677 = 1231 ⋅13267.

It is not a de Polignac number, because 77613361 - 2³ = 77613353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77613301) 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, 5543805 + ... + 5543818.

It is an arithmetic number, because the mean of its divisors is an integer number (22175248).

Almost surely, 2^77613361 is an apocalyptic number.

It is an amenable number.

77613361 is a deficient number, since it is larger than the sum of its proper divisors (11087631).

77613361 is a wasteful number, since it uses less digits than its factorization.

77613361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11087630.

The product of its digits is 15876, while the sum is 34.

The square root of 77613361 is about 8809.8445502744. The cubic root of 77613361 is about 426.5587256108.

The spelling of 77613361 in words is "seventy-seven million, six hundred thirteen thousand, three hundred sixty-one".