31072849 has 2 divisors, whose sum is σ = 31072850. Its totient is φ = 31072848.

The previous prime is 31072843. The next prime is 31072879. The reversal of 31072849 is 94827013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31002624 + 70225 = 5568^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 31072849 - 2³ = 31072841 is a prime.

It is not a weakly prime, because it can be changed into another prime (31072841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15536424 + 15536425.

It is an arithmetic number, because the mean of its divisors is an integer number (15536425).

Almost surely, 2^31072849 is an apocalyptic number.

It is an amenable number.

31072849 is a deficient number, since it is larger than the sum of its proper divisors (1).

31072849 is an equidigital number, since it uses as much as digits as its factorization.

31072849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 31072849 is about 5574.3025572712. The cubic root of 31072849 is about 314.3839441770.

The spelling of 31072849 in words is "thirty-one million, seventy-two thousand, eight hundred forty-nine".