31106429 has 2 divisors, whose sum is σ = 31106430. Its totient is φ = 31106428.

The previous prime is 31106417. The next prime is 31106437. The reversal of 31106429 is 92460113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 8543929 = 4750^2 + 2923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31106429 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31106398 and 31106407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31106489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15553214 + 15553215.

It is an arithmetic number, because the mean of its divisors is an integer number (15553215).

Almost surely, 2^31106429 is an apocalyptic number.

It is an amenable number.

31106429 is a deficient number, since it is larger than the sum of its proper divisors (1).

31106429 is an equidigital number, since it uses as much as digits as its factorization.

31106429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 31106429 is about 5577.3137799482. The cubic root of 31106429 is about 314.4971535385.

The spelling of 31106429 in words is "thirty-one million, one hundred six thousand, four hundred twenty-nine".