77191313 has 8 divisors (see below), whose sum is σ = 77928960. Its totient is φ = 76457520.

The previous prime is 77191307. The next prime is 77191327. The reversal of 77191313 is 31319177.

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

It is a cyclic number.

It is not a de Polignac number, because 77191313 - 2¹⁸ = 76929169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77191313.

It is not an unprimeable number, because it can be changed into a prime (77191913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52178 + ... + 53636.

It is an arithmetic number, because the mean of its divisors is an integer number (9741120).

Almost surely, 2^77191313 is an apocalyptic number.

It is an amenable number.

77191313 is a deficient number, since it is larger than the sum of its proper divisors (737647).

77191313 is a wasteful number, since it uses less digits than its factorization.

77191313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927.

The product of its digits is 3969, while the sum is 32.

The square root of 77191313 is about 8785.8586945159. The cubic root of 77191313 is about 425.7841357509.

The spelling of 77191313 in words is "seventy-seven million, one hundred ninety-one thousand, three hundred thirteen".