68199857 has 4 divisors (see below), whose sum is σ = 74399856. Its totient is φ = 61999860.

The previous prime is 68199847. The next prime is 68199863. The reversal of 68199857 is 75899186.

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 68199857 - 2²⁰ = 67151281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68199799 and 68199808.

It is not an unprimeable number, because it can be changed into a prime (68199847) 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, 3099983 + ... + 3100004.

It is an arithmetic number, because the mean of its divisors is an integer number (18599964).

Almost surely, 2^68199857 is an apocalyptic number.

It is an amenable number.

68199857 is a deficient number, since it is larger than the sum of its proper divisors (6199999).

68199857 is a wasteful number, since it uses less digits than its factorization.

68199857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199998.

The product of its digits is 1088640, while the sum is 53.

The square root of 68199857 is about 8258.3204708948. The cubic root of 68199857 is about 408.5649952239.

The spelling of 68199857 in words is "sixty-eight million, one hundred ninety-nine thousand, eight hundred fifty-seven".