77893191 has 8 divisors (see below), whose sum is σ = 115397360. Its totient is φ = 51928776.

The previous prime is 77893163. The next prime is 77893213. The reversal of 77893191 is 19139877.

It is not a de Polignac number, because 77893191 - 2¹⁰ = 77892167 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 (77893091) 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, 1442440 + ... + 1442493.

It is an arithmetic number, because the mean of its divisors is an integer number (14424670).

Almost surely, 2^77893191 is an apocalyptic number.

77893191 is a deficient number, since it is larger than the sum of its proper divisors (37504169).

77893191 is a wasteful number, since it uses less digits than its factorization.

77893191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884942 (or 2884936 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 77893191 is about 8825.7119259582. The cubic root of 77893191 is about 427.0707541254.

The spelling of 77893191 in words is "seventy-seven million, eight hundred ninety-three thousand, one hundred ninety-one".