31488089 has 2 divisors, whose sum is σ = 31488090. Its totient is φ = 31488088.

The previous prime is 31488071. The next prime is 31488091. The reversal of 31488089 is 98088413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29214025 + 2274064 = 5405^2 + 1508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31488089 is a prime.

Together with 31488091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31488019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15744044 + 15744045.

It is an arithmetic number, because the mean of its divisors is an integer number (15744045).

Almost surely, 2^31488089 is an apocalyptic number.

It is an amenable number.

31488089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31488089 is an equidigital number, since it uses as much as digits as its factorization.

31488089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 31488089 is about 5611.4248636153. The cubic root of 31488089 is about 315.7781684310.

The spelling of 31488089 in words is "thirty-one million, four hundred eighty-eight thousand, eighty-nine".