31350089 has 2 divisors, whose sum is σ = 31350090. Its totient is φ = 31350088.

The previous prime is 31350061. The next prime is 31350101. The reversal of 31350089 is 98005313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 824464 = 5525^2 + 908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31350089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31350049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15675044 + 15675045.

It is an arithmetic number, because the mean of its divisors is an integer number (15675045).

Almost surely, 2^31350089 is an apocalyptic number.

It is an amenable number.

31350089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31350089 is an equidigital number, since it uses as much as digits as its factorization.

31350089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 31350089 is about 5599.1150193580. The cubic root of 31350089 is about 315.3161820633.

The spelling of 31350089 in words is "thirty-one million, three hundred fifty thousand, eighty-nine".