31348769 has 2 divisors, whose sum is σ = 31348770. Its totient is φ = 31348768.

The previous prime is 31348741. The next prime is 31348777. The reversal of 31348769 is 96784313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27300625 + 4048144 = 5225^2 + 2012^2 .

It is a cyclic number.

It is not a de Polignac number, because 31348769 - 2²⁴ = 14571553 is a prime.

It is a super-2 number, since 2×31348769² = 1965490635630722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31348789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15674384 + 15674385.

It is an arithmetic number, because the mean of its divisors is an integer number (15674385).

Almost surely, 2^31348769 is an apocalyptic number.

It is an amenable number.

31348769 is a deficient number, since it is larger than the sum of its proper divisors (1).

31348769 is an equidigital number, since it uses as much as digits as its factorization.

31348769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 31348769 is about 5598.9971423461. The cubic root of 31348769 is about 315.3117565235.

The spelling of 31348769 in words is "thirty-one million, three hundred forty-eight thousand, seven hundred sixty-nine".