31980029 has 2 divisors, whose sum is σ = 31980030. Its totient is φ = 31980028.

The previous prime is 31980007. The next prime is 31980037. The reversal of 31980029 is 92008913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22992025 + 8988004 = 4795^2 + 2998^2 .

It is a cyclic number.

It is not a de Polignac number, because 31980029 - 2²⁴ = 15202813 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31979977 and 31980004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31980049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15990014 + 15990015.

It is an arithmetic number, because the mean of its divisors is an integer number (15990015).

Almost surely, 2^31980029 is an apocalyptic number.

It is an amenable number.

31980029 is a deficient number, since it is larger than the sum of its proper divisors (1).

31980029 is an equidigital number, since it uses as much as digits as its factorization.

31980029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 31980029 is about 5655.0887703024. The cubic root of 31980029 is about 317.4141508443.

The spelling of 31980029 in words is "thirty-one million, nine hundred eighty thousand, twenty-nine".