77936493 has 16 divisors (see below), whose sum is σ = 105545216. Its totient is φ = 51148800.

The previous prime is 77936491. The next prime is 77936497. The reversal of 77936493 is 39463977.

It is not a de Polignac number, because 77936493 - 2¹ = 77936491 is a prime.

It is a super-2 number, since 2×77936493² = 12148193882278098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77936491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64293 + ... + 65493.

It is an arithmetic number, because the mean of its divisors is an integer number (6596576).

Almost surely, 2^77936493 is an apocalyptic number.

It is an amenable number.

77936493 is a deficient number, since it is larger than the sum of its proper divisors (27608723).

77936493 is a wasteful number, since it uses less digits than its factorization.

77936493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524.

The product of its digits is 857304, while the sum is 48.

The square root of 77936493 is about 8828.1647583176. The cubic root of 77936493 is about 427.1498778235.

The spelling of 77936493 in words is "seventy-seven million, nine hundred thirty-six thousand, four hundred ninety-three".