68204951 has 4 divisors (see below), whose sum is σ = 68246304. Its totient is φ = 68163600.

The previous prime is 68204933. The next prime is 68204957. The reversal of 68204951 is 15940286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15940286 = 2 ⋅7970143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68204951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68204957) 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, 18095 + ... + 21536.

It is an arithmetic number, because the mean of its divisors is an integer number (17061576).

Almost surely, 2^68204951 is an apocalyptic number.

68204951 is a deficient number, since it is larger than the sum of its proper divisors (41353).

68204951 is a wasteful number, since it uses less digits than its factorization.

68204951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41352.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 68204951 is about 8258.6288813580. The cubic root of 68204951 is about 408.5751671820.

The spelling of 68204951 in words is "sixty-eight million, two hundred four thousand, nine hundred fifty-one".