31401199 has 2 divisors, whose sum is σ = 31401200. Its totient is φ = 31401198.

The previous prime is 31401179. The next prime is 31401211. The reversal of 31401199 is 99110413.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31401199 - 2¹⁵ = 31368431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31401119) 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, 15700599 + 15700600.

It is an arithmetic number, because the mean of its divisors is an integer number (15700600).

Almost surely, 2^31401199 is an apocalyptic number.

31401199 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401199 is an equidigital number, since it uses as much as digits as its factorization.

31401199 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 28.

The square root of 31401199 is about 5603.6772747902. The cubic root of 31401199 is about 315.4874421846.

The spelling of 31401199 in words is "thirty-one million, four hundred one thousand, one hundred ninety-nine".