31061629 has 2 divisors, whose sum is σ = 31061630. Its totient is φ = 31061628.

The previous prime is 31061617. The next prime is 31061633. The reversal of 31061629 is 92616013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16999129 + 14062500 = 4123^2 + 3750^2 .

It is a cyclic number.

It is not a de Polignac number, because 31061629 - 2¹³ = 31053437 is a prime.

It is a super-2 number, since 2×31061629² = 1929649592267282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31061597 and 31061606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31061729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15530814 + 15530815.

It is an arithmetic number, because the mean of its divisors is an integer number (15530815).

Almost surely, 2^31061629 is an apocalyptic number.

It is an amenable number.

31061629 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061629 is an equidigital number, since it uses as much as digits as its factorization.

31061629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31061629 is about 5573.2960624751. The cubic root of 31061629 is about 314.3460996427.

The spelling of 31061629 in words is "thirty-one million, sixty-one thousand, six hundred twenty-nine".