31061189 has 2 divisors, whose sum is σ = 31061190. Its totient is φ = 31061188.

The previous prime is 31061183. The next prime is 31061197. The reversal of 31061189 is 98116013.

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., 29757025 + 1304164 = 5455^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 31061189 - 2⁸ = 31060933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31061183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15530594 + 15530595.

It is an arithmetic number, because the mean of its divisors is an integer number (15530595).

Almost surely, 2^31061189 is an apocalyptic number.

It is an amenable number.

31061189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061189 is an equidigital number, since it uses as much as digits as its factorization.

31061189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 31061189 is about 5573.2565883871. The cubic root of 31061189 is about 314.3446153576.

The spelling of 31061189 in words is "thirty-one million, sixty-one thousand, one hundred eighty-nine".