31830089 has 2 divisors, whose sum is σ = 31830090. Its totient is φ = 31830088.

The previous prime is 31830083. The next prime is 31830109. The reversal of 31830089 is 98003813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30691600 + 1138489 = 5540^2 + 1067^2 .

It is an emirp because it is prime and its reverse (98003813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31830089 - 2¹² = 31825993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31830083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15915044 + 15915045.

It is an arithmetic number, because the mean of its divisors is an integer number (15915045).

Almost surely, 2^31830089 is an apocalyptic number.

It is an amenable number.

31830089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31830089 is an equidigital number, since it uses as much as digits as its factorization.

31830089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 31830089 is about 5641.8161083112. The cubic root of 31830089 is about 316.9173027125.

The spelling of 31830089 in words is "thirty-one million, eight hundred thirty thousand, eighty-nine".