31398119 has 2 divisors, whose sum is σ = 31398120. Its totient is φ = 31398118.

The previous prime is 31398113. The next prime is 31398131. The reversal of 31398119 is 91189313.

It is a weak prime.

It is an emirp because it is prime and its reverse (91189313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31398119 is a prime.

It is a super-2 number, since 2×31398119² = 1971683753476322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31398113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15699059 + 15699060.

It is an arithmetic number, because the mean of its divisors is an integer number (15699060).

Almost surely, 2^31398119 is an apocalyptic number.

31398119 is a deficient number, since it is larger than the sum of its proper divisors (1).

31398119 is an equidigital number, since it uses as much as digits as its factorization.

31398119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 35.

The square root of 31398119 is about 5603.4024485129. The cubic root of 31398119 is about 315.4771269405.

The spelling of 31398119 in words is "thirty-one million, three hundred ninety-eight thousand, one hundred nineteen".