68931819 has 12 divisors (see below), whose sum is σ = 108619992. Its totient is φ = 41776800.

The previous prime is 68931803. The next prime is 68931833. The reversal of 68931819 is 91813986.

It is not a de Polignac number, because 68931819 - 2⁴ = 68931803 is a prime.

It is a super-2 number, since 2×68931819² = 9503191341297522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68931839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348042 + ... + 348239.

It is an arithmetic number, because the mean of its divisors is an integer number (9051666).

Almost surely, 2^68931819 is an apocalyptic number.

68931819 is a deficient number, since it is larger than the sum of its proper divisors (39688173).

68931819 is a wasteful number, since it uses less digits than its factorization.

68931819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696298 (or 696295 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 68931819 is about 8302.5188346670. The cubic root of 68931819 is about 410.0214523774.

The spelling of 68931819 in words is "sixty-eight million, nine hundred thirty-one thousand, eight hundred nineteen".