77213765 has 8 divisors (see below), whose sum is σ = 92755968. Its totient is φ = 61704720.

The previous prime is 77213723. The next prime is 77213789. The reversal of 77213765 is 56731277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77213765 - 2¹⁰ = 77212741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2837 + ... + 12746.

It is an arithmetic number, because the mean of its divisors is an integer number (11594496).

Almost surely, 2^77213765 is an apocalyptic number.

It is an amenable number.

77213765 is a deficient number, since it is larger than the sum of its proper divisors (15542203).

77213765 is a wasteful number, since it uses less digits than its factorization.

77213765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16579.

The product of its digits is 61740, while the sum is 38.

The square root of 77213765 is about 8787.1363367140. The cubic root of 77213765 is about 425.8254131881.

The spelling of 77213765 in words is "seventy-seven million, two hundred thirteen thousand, seven hundred sixty-five".