31490323 has 2 divisors, whose sum is σ = 31490324. Its totient is φ = 31490322.

The previous prime is 31490299. The next prime is 31490339. The reversal of 31490323 is 32309413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31490323 is a prime.

It is not a weakly prime, because it can be changed into another prime (31490363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15745161 + 15745162.

It is an arithmetic number, because the mean of its divisors is an integer number (15745162).

Almost surely, 2^31490323 is an apocalyptic number.

31490323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31490323 is an equidigital number, since it uses as much as digits as its factorization.

31490323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 31490323 is about 5611.6239182611. The cubic root of 31490323 is about 315.7856361410.

Adding to 31490323 its reverse (32309413), we get a palindrome (63799736).

It can be divided in two parts, 31490 and 323, that added together give a palindrome (31813).

The spelling of 31490323 in words is "thirty-one million, four hundred ninety thousand, three hundred twenty-three".