31070089 has 2 divisors, whose sum is σ = 31070090. Its totient is φ = 31070088.

The previous prime is 31070057. The next prime is 31070099. The reversal of 31070089 is 98007013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 8602489 = 4740^2 + 2933^2 .

It is a cyclic number.

It is not a de Polignac number, because 31070089 - 2⁵ = 31070057 is a prime.

It is not a weakly prime, because it can be changed into another prime (31070009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15535044 + 15535045.

It is an arithmetic number, because the mean of its divisors is an integer number (15535045).

Almost surely, 2^31070089 is an apocalyptic number.

It is an amenable number.

31070089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31070089 is an equidigital number, since it uses as much as digits as its factorization.

31070089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 31070089 is about 5574.0549871705. The cubic root of 31070089 is about 314.3746356713.

The spelling of 31070089 in words is "thirty-one million, seventy thousand, eighty-nine".