68299057 has 4 divisors (see below), whose sum is σ = 68592420. Its totient is φ = 68005696.

The previous prime is 68299051. The next prime is 68299069. The reversal of 68299057 is 75099286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32251041 + 36048016 = 5679^2 + 6004^2 .

It is a cyclic number.

It is not a de Polignac number, because 68299057 - 2²³ = 59910449 is a prime.

It is a super-2 number, since 2×68299057² = 9329522374178498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68298998 and 68299016.

It is not an unprimeable number, because it can be changed into a prime (68299051) 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, 146332 + ... + 146797.

It is an arithmetic number, because the mean of its divisors is an integer number (17148105).

Almost surely, 2^68299057 is an apocalyptic number.

It is an amenable number.

68299057 is a deficient number, since it is larger than the sum of its proper divisors (293363).

68299057 is a wasteful number, since it uses less digits than its factorization.

68299057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293362.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 68299057 is about 8264.3243522989. The cubic root of 68299057 is about 408.7629917906.

The spelling of 68299057 in words is "sixty-eight million, two hundred ninety-nine thousand, fifty-seven".