31396019 has 2 divisors, whose sum is σ = 31396020. Its totient is φ = 31396018.

The previous prime is 31396003. The next prime is 31396049. The reversal of 31396019 is 91069313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31396019 - 2⁴ = 31396003 is a prime.

It is a super-2 number, since 2×31396019² = 1971420018096722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31396049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15698009 + 15698010.

It is an arithmetic number, because the mean of its divisors is an integer number (15698010).

Almost surely, 2^31396019 is an apocalyptic number.

31396019 is a deficient number, since it is larger than the sum of its proper divisors (1).

31396019 is an equidigital number, since it uses as much as digits as its factorization.

31396019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 31396019 is about 5603.2150592316. The cubic root of 31396019 is about 315.4700934328.

The spelling of 31396019 in words is "thirty-one million, three hundred ninety-six thousand, nineteen".