68799457 has 4 divisors (see below), whose sum is σ = 68817600. Its totient is φ = 68781316.

The previous prime is 68799449. The next prime is 68799469. The reversal of 68799457 is 75499786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68799457 - 2³ = 68799449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68799398 and 68799407.

It is not an unprimeable number, because it can be changed into a prime (68799557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973 + ... + 11770.

It is an arithmetic number, because the mean of its divisors is an integer number (17204400).

Almost surely, 2^68799457 is an apocalyptic number.

It is an amenable number.

68799457 is a deficient number, since it is larger than the sum of its proper divisors (18143).

68799457 is a wasteful number, since it uses less digits than its factorization.

68799457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18142.

The product of its digits is 3810240, while the sum is 55.

The square root of 68799457 is about 8294.5438090349. The cubic root of 68799457 is about 409.7588448987.

The spelling of 68799457 in words is "sixty-eight million, seven hundred ninety-nine thousand, four hundred fifty-seven".