68942251 has 8 divisors (see below), whose sum is σ = 81508320. Its totient is φ = 57055488.

The previous prime is 68942243. The next prime is 68942353. The reversal of 68942251 is 15224986.

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

It is not a de Polignac number, because 68942251 - 2³ = 68942243 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 68942251.

It is not an unprimeable number, because it can be changed into a prime (68942231) 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, 169606 + ... + 170011.

It is an arithmetic number, because the mean of its divisors is an integer number (10188540).

Almost surely, 2^68942251 is an apocalyptic number.

68942251 is a deficient number, since it is larger than the sum of its proper divisors (12566069).

68942251 is a wasteful number, since it uses less digits than its factorization.

68942251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339653.

The product of its digits is 34560, while the sum is 37.

The square root of 68942251 is about 8303.1470539790. The cubic root of 68942251 is about 410.0421352691.

The spelling of 68942251 in words is "sixty-eight million, nine hundred forty-two thousand, two hundred fifty-one".