31364891 has 2 divisors, whose sum is σ = 31364892. Its totient is φ = 31364890.

The previous prime is 31364873. The next prime is 31364909. The reversal of 31364891 is 19846313.

It is a balanced prime because it is at equal distance from previous prime (31364873) and next prime (31364909).

It is a cyclic number.

It is not a de Polignac number, because 31364891 - 2²² = 27170587 is a prime.

It is not a weakly prime, because it can be changed into another prime (31364821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15682445 + 15682446.

It is an arithmetic number, because the mean of its divisors is an integer number (15682446).

Almost surely, 2^31364891 is an apocalyptic number.

31364891 is a deficient number, since it is larger than the sum of its proper divisors (1).

31364891 is an equidigital number, since it uses as much as digits as its factorization.

31364891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 31364891 is about 5600.4366794028. The cubic root of 31364891 is about 315.3657999529.

The spelling of 31364891 in words is "thirty-one million, three hundred sixty-four thousand, eight hundred ninety-one".