77086393 has 4 divisors (see below), whose sum is σ = 77107840. Its totient is φ = 77064948.

The previous prime is 77086357. The next prime is 77086403. The reversal of 77086393 is 39368077.

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 not a de Polignac number, because 77086393 - 2¹⁷ = 76955321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77086693) 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, 3873 + ... + 13006.

It is an arithmetic number, because the mean of its divisors is an integer number (19276960).

Almost surely, 2^77086393 is an apocalyptic number.

It is an amenable number.

77086393 is a deficient number, since it is larger than the sum of its proper divisors (21447).

77086393 is a wasteful number, since it uses less digits than its factorization.

77086393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21446.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 77086393 is about 8779.8857054064. The cubic root of 77086393 is about 425.5911368009.

The spelling of 77086393 in words is "seventy-seven million, eighty-six thousand, three hundred ninety-three".