31400099 has 2 divisors, whose sum is σ = 31400100. Its totient is φ = 31400098.

The previous prime is 31400081. The next prime is 31400119. The reversal of 31400099 is 99000413.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99000413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31400099 - 2¹² = 31396003 is a prime.

It is not a weakly prime, because it can be changed into another prime (31400029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700049 + 15700050.

It is an arithmetic number, because the mean of its divisors is an integer number (15700050).

Almost surely, 2^31400099 is an apocalyptic number.

31400099 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400099 is an equidigital number, since it uses as much as digits as its factorization.

31400099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 31400099 is about 5603.5791240956. The cubic root of 31400099 is about 315.4837582463.

The spelling of 31400099 in words is "thirty-one million, four hundred thousand, ninety-nine".