77674493 has 4 divisors (see below), whose sum is σ = 83649468. Its totient is φ = 71699520.

The previous prime is 77674481. The next prime is 77674529. The reversal of 77674493 is 39447677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39447677 = 1511 ⋅26107.

It can be written as a sum of positive squares in 2 ways, for example, as 6744409 + 70930084 = 2597^2 + 8422^2 .

It is a cyclic number.

It is not a de Polignac number, because 77674493 - 2⁴ = 77674477 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 (77674423) 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, 2987468 + ... + 2987493.

It is an arithmetic number, because the mean of its divisors is an integer number (20912367).

Almost surely, 2^77674493 is an apocalyptic number.

It is an amenable number.

77674493 is a deficient number, since it is larger than the sum of its proper divisors (5974975).

77674493 is a wasteful number, since it uses less digits than its factorization.

77674493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5974974.

The product of its digits is 889056, while the sum is 47.

The square root of 77674493 is about 8813.3133950859. The cubic root of 77674493 is about 426.6706889134.

The spelling of 77674493 in words is "seventy-seven million, six hundred seventy-four thousand, four hundred ninety-three".