631986029 has 2 divisors, whose sum is σ = 631986030. Its totient is φ = 631986028.

The previous prime is 631985983. The next prime is 631986041. The reversal of 631986029 is 920689136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619910404 + 12075625 = 24898^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631986029 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 (631986059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315993014 + 315993015.

It is an arithmetic number, because the mean of its divisors is an integer number (315993015).

Almost surely, 2^631986029 is an apocalyptic number.

It is an amenable number.

631986029 is a deficient number, since it is larger than the sum of its proper divisors (1).

631986029 is an equidigital number, since it uses as much as digits as its factorization.

631986029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 631986029 is about 25139.3323101470. The cubic root of 631986029 is about 858.1617618005.

The spelling of 631986029 in words is "six hundred thirty-one million, nine hundred eighty-six thousand, twenty-nine".