31629149 has 2 divisors, whose sum is σ = 31629150. Its totient is φ = 31629148.

The previous prime is 31629139. The next prime is 31629173. The reversal of 31629149 is 94192613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29920900 + 1708249 = 5470^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 31629149 - 2²⁰ = 30580573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31629109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15814574 + 15814575.

It is an arithmetic number, because the mean of its divisors is an integer number (15814575).

Almost surely, 2^31629149 is an apocalyptic number.

It is an amenable number.

31629149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31629149 is an equidigital number, since it uses as much as digits as its factorization.

31629149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 31629149 is about 5623.9798185982. The cubic root of 31629149 is about 316.2490059179.

The spelling of 31629149 in words is "thirty-one million, six hundred twenty-nine thousand, one hundred forty-nine".