631142117 has 2 divisors, whose sum is σ = 631142118. Its totient is φ = 631142116.

The previous prime is 631142107. The next prime is 631142123. The reversal of 631142117 is 711241136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554649601 + 76492516 = 23551^2 + 8746^2 .

It is a cyclic number.

It is not a de Polignac number, because 631142117 - 2⁴ = 631142101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631142107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315571058 + 315571059.

It is an arithmetic number, because the mean of its divisors is an integer number (315571059).

Almost surely, 2^631142117 is an apocalyptic number.

It is an amenable number.

631142117 is a deficient number, since it is larger than the sum of its proper divisors (1).

631142117 is an equidigital number, since it uses as much as digits as its factorization.

631142117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 631142117 is about 25122.5420091200. The cubic root of 631142117 is about 857.7796143214.

The spelling of 631142117 in words is "six hundred thirty-one million, one hundred forty-two thousand, one hundred seventeen".