31442629 has 2 divisors, whose sum is σ = 31442630. Its totient is φ = 31442628.

The previous prime is 31442623. The next prime is 31442657. The reversal of 31442629 is 92624413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30636225 + 806404 = 5535^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 31442629 - 2¹⁹ = 30918341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31442629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31442623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721314 + 15721315.

It is an arithmetic number, because the mean of its divisors is an integer number (15721315).

Almost surely, 2^31442629 is an apocalyptic number.

It is an amenable number.

31442629 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442629 is an equidigital number, since it uses as much as digits as its factorization.

31442629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 31442629 is about 5607.3727359611. The cubic root of 31442629 is about 315.6261301008.

The spelling of 31442629 in words is "thirty-one million, four hundred forty-two thousand, six hundred twenty-nine".