68431799 has 4 divisors (see below), whose sum is σ = 69591720. Its totient is φ = 67271880.

The previous prime is 68431771. The next prime is 68431807. The reversal of 68431799 is 99713486.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68431799 is a prime.

It is a super-2 number, since 2×68431799² = 9365822228752802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68431999) 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, 579872 + ... + 579989.

It is an arithmetic number, because the mean of its divisors is an integer number (17397930).

Almost surely, 2^68431799 is an apocalyptic number.

68431799 is a deficient number, since it is larger than the sum of its proper divisors (1159921).

68431799 is a wasteful number, since it uses less digits than its factorization.

68431799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159920.

The product of its digits is 326592, while the sum is 47.

The square root of 68431799 is about 8272.3514794767. The cubic root of 68431799 is about 409.0276362584.

The spelling of 68431799 in words is "sixty-eight million, four hundred thirty-one thousand, seven hundred ninety-nine".