31074749 has 2 divisors, whose sum is σ = 31074750. Its totient is φ = 31074748.

The previous prime is 31074739. The next prime is 31074773. The reversal of 31074749 is 94747013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 9498724 = 4645^2 + 3082^2 .

It is an emirp because it is prime and its reverse (94747013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31074749 - 2⁴ = 31074733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31074739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15537374 + 15537375.

It is an arithmetic number, because the mean of its divisors is an integer number (15537375).

Almost surely, 2^31074749 is an apocalyptic number.

It is an amenable number.

31074749 is a deficient number, since it is larger than the sum of its proper divisors (1).

31074749 is an equidigital number, since it uses as much as digits as its factorization.

31074749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 31074749 is about 5574.4729795739. The cubic root of 31074749 is about 314.3903518860.

The spelling of 31074749 in words is "thirty-one million, seventy-four thousand, seven hundred forty-nine".