631672061 has 2 divisors, whose sum is σ = 631672062. Its totient is φ = 631672060.

The previous prime is 631672037. The next prime is 631672121. The reversal of 631672061 is 160276136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535043161 + 96628900 = 23131^2 + 9830^2 .

It is a cyclic number.

It is not a de Polignac number, because 631672061 - 2¹⁴ = 631655677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631672001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315836030 + 315836031.

It is an arithmetic number, because the mean of its divisors is an integer number (315836031).

Almost surely, 2^631672061 is an apocalyptic number.

It is an amenable number.

631672061 is a deficient number, since it is larger than the sum of its proper divisors (1).

631672061 is an equidigital number, since it uses as much as digits as its factorization.

631672061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 631672061 is about 25133.0869771304. The cubic root of 631672061 is about 858.0196278766.

The spelling of 631672061 in words is "six hundred thirty-one million, six hundred seventy-two thousand, sixty-one".