31420099 has 2 divisors, whose sum is σ = 31420100. Its totient is φ = 31420098.

The previous prime is 31420069. The next prime is 31420133. The reversal of 31420099 is 99002413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31420099 - 2¹³ = 31411907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31420009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710049 + 15710050.

It is an arithmetic number, because the mean of its divisors is an integer number (15710050).

Almost surely, 2^31420099 is an apocalyptic number.

31420099 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420099 is an equidigital number, since it uses as much as digits as its factorization.

31420099 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 28.

The square root of 31420099 is about 5605.3634137315. The cubic root of 31420099 is about 315.5507255087.

The spelling of 31420099 in words is "thirty-one million, four hundred twenty thousand, ninety-nine".