31385099 has 2 divisors, whose sum is σ = 31385100. Its totient is φ = 31385098.

The previous prime is 31385083. The next prime is 31385153. The reversal of 31385099 is 99058313.

It is a weak prime.

It is an emirp because it is prime and its reverse (99058313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31385099 - 2⁴ = 31385083 is a prime.

It is not a weakly prime, because it can be changed into another prime (31385059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15692549 + 15692550.

It is an arithmetic number, because the mean of its divisors is an integer number (15692550).

Almost surely, 2^31385099 is an apocalyptic number.

31385099 is a deficient number, since it is larger than the sum of its proper divisors (1).

31385099 is an equidigital number, since it uses as much as digits as its factorization.

31385099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 31385099 is about 5602.2405339293. The cubic root of 31385099 is about 315.4335141360.

The spelling of 31385099 in words is "thirty-one million, three hundred eighty-five thousand, ninety-nine".