31490299 has 2 divisors, whose sum is σ = 31490300. Its totient is φ = 31490298.

The previous prime is 31490297. The next prime is 31490323. The reversal of 31490299 is 99209413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31490299 - 2¹ = 31490297 is a prime.

It is a super-2 number, since 2×31490299² = 1983277862218802, which contains 22 as substring.

Together with 31490297, 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 (31490297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15745149 + 15745150.

It is an arithmetic number, because the mean of its divisors is an integer number (15745150).

Almost surely, 2^31490299 is an apocalyptic number.

31490299 is a deficient number, since it is larger than the sum of its proper divisors (1).

31490299 is an equidigital number, since it uses as much as digits as its factorization.

31490299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 31490299 is about 5611.6217798423. The cubic root of 31490299 is about 315.7855559168.

The spelling of 31490299 in words is "thirty-one million, four hundred ninety thousand, two hundred ninety-nine".