77799457 has 8 divisors (see below), whose sum is σ = 79322112. Its totient is φ = 76288800.

The previous prime is 77799451. The next prime is 77799467. The reversal of 77799457 is 75499777.

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 77799457 - 2⁷ = 77799329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77799398 and 77799407.

It is not an unprimeable number, because it can be changed into a prime (77799451) 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, 10693 + ... + 16429.

It is an arithmetic number, because the mean of its divisors is an integer number (9915264).

Almost surely, 2^77799457 is an apocalyptic number.

It is an amenable number.

77799457 is a deficient number, since it is larger than the sum of its proper divisors (1522655).

77799457 is a wasteful number, since it uses less digits than its factorization.

77799457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999.

The product of its digits is 3889620, while the sum is 55.

The square root of 77799457 is about 8820.4000476169. The cubic root of 77799457 is about 426.8993779215.

The spelling of 77799457 in words is "seventy-seven million, seven hundred ninety-nine thousand, four hundred fifty-seven".