31089011 has 2 divisors, whose sum is σ = 31089012. Its totient is φ = 31089010.

The previous prime is 31089007. The next prime is 31089013. The reversal of 31089011 is 11098013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31089011 - 2² = 31089007 is a prime.

It is a Sophie Germain prime.

Together with 31089013, 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 (31089013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15544505 + 15544506.

It is an arithmetic number, because the mean of its divisors is an integer number (15544506).

Almost surely, 2^31089011 is an apocalyptic number.

31089011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31089011 is an equidigital number, since it uses as much as digits as its factorization.

31089011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 31089011 is about 5575.7520568978. The cubic root of 31089011 is about 314.4384418363.

The spelling of 31089011 in words is "thirty-one million, eighty-nine thousand, eleven".