77055613 has 4 divisors (see below), whose sum is σ = 78847648. Its totient is φ = 75263580.

The previous prime is 77055569. The next prime is 77055619. The reversal of 77055613 is 31655077.

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-77055613 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 (77055619) 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, 895953 + ... + 896038.

It is an arithmetic number, because the mean of its divisors is an integer number (19711912).

Almost surely, 2^77055613 is an apocalyptic number.

It is an amenable number.

77055613 is a deficient number, since it is larger than the sum of its proper divisors (1792035).

77055613 is a wasteful number, since it uses less digits than its factorization.

77055613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792034.

The product of its (nonzero) digits is 22050, while the sum is 34.

The square root of 77055613 is about 8778.1326601960. The cubic root of 77055613 is about 425.5344841777.

The spelling of 77055613 in words is "seventy-seven million, fifty-five thousand, six hundred thirteen".