68920899 has 8 divisors (see below), whose sum is σ = 94378320. Its totient is φ = 44705376.

The previous prime is 68920889. The next prime is 68920913. The reversal of 68920899 is 99802986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68920899 - 2⁵ = 68920867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68920889) 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, 310344 + ... + 310565.

It is an arithmetic number, because the mean of its divisors is an integer number (11797290).

Almost surely, 2^68920899 is an apocalyptic number.

68920899 is a deficient number, since it is larger than the sum of its proper divisors (25457421).

68920899 is a wasteful number, since it uses less digits than its factorization.

68920899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620949.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 68920899 is about 8301.8611768687. The cubic root of 68920899 is about 409.9997997223. Note that the first 3 decimals are identical.

The spelling of 68920899 in words is "sixty-eight million, nine hundred twenty thousand, eight hundred ninety-nine".