68172631 has 8 divisors (see below), whose sum is σ = 69431040. Its totient is φ = 66924792.

The previous prime is 68172617. The next prime is 68172647. The reversal of 68172631 is 13627186.

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

It is a cyclic number.

It is not a de Polignac number, because 68172631 - 2²¹ = 66075479 is a prime.

It is a super-2 number, since 2×68172631² = 9295015234924322, 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 (68172691) 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, 11010 + ... + 16048.

It is an arithmetic number, because the mean of its divisors is an integer number (8678880).

Almost surely, 2^68172631 is an apocalyptic number.

68172631 is a deficient number, since it is larger than the sum of its proper divisors (1258409).

68172631 is a wasteful number, since it uses less digits than its factorization.

68172631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285.

The product of its digits is 12096, while the sum is 34.

The square root of 68172631 is about 8256.6719082206. The cubic root of 68172631 is about 408.5106203733.

The spelling of 68172631 in words is "sixty-eight million, one hundred seventy-two thousand, six hundred thirty-one".