68190929 has 4 divisors (see below), whose sum is σ = 71155776. Its totient is φ = 65226084.

The previous prime is 68190923. The next prime is 68190931. The reversal of 68190929 is 92909186.

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 68190929 - 2⁸ = 68190673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68190929.

It is not an unprimeable number, because it can be changed into a prime (68190923) 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, 1482389 + ... + 1482434.

It is an arithmetic number, because the mean of its divisors is an integer number (17788944).

Almost surely, 2^68190929 is an apocalyptic number.

It is an amenable number.

68190929 is a deficient number, since it is larger than the sum of its proper divisors (2964847).

68190929 is a wasteful number, since it uses less digits than its factorization.

68190929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964846.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 68190929 is about 8257.7799074570. The cubic root of 68190929 is about 408.5471661178.

The spelling of 68190929 in words is "sixty-eight million, one hundred ninety thousand, nine hundred twenty-nine".