31490363 has 2 divisors, whose sum is σ = 31490364. Its totient is φ = 31490362.

The previous prime is 31490359. The next prime is 31490369. The reversal of 31490363 is 36309413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31490363 - 2² = 31490359 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31490369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15745181 + 15745182.

It is an arithmetic number, because the mean of its divisors is an integer number (15745182).

Almost surely, 2^31490363 is an apocalyptic number.

31490363 is a deficient number, since it is larger than the sum of its proper divisors (1).

31490363 is an equidigital number, since it uses as much as digits as its factorization.

31490363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 31490363 is about 5611.6274822907. The cubic root of 31490363 is about 315.7857698479.

Adding to 31490363 its reverse (36309413), we get a palindrome (67799776).

The spelling of 31490363 in words is "thirty-one million, four hundred ninety thousand, three hundred sixty-three".