31860449 has 2 divisors, whose sum is σ = 31860450. Its totient is φ = 31860448.

The previous prime is 31860421. The next prime is 31860509. The reversal of 31860449 is 94406813.

31860449 is nontrivially palindromic in base 16.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28815424 + 3045025 = 5368^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 31860449 - 2¹² = 31856353 is a prime.

It is not a weakly prime, because it can be changed into another prime (31860149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15930224 + 15930225.

It is an arithmetic number, because the mean of its divisors is an integer number (15930225).

Almost surely, 2^31860449 is an apocalyptic number.

It is an amenable number.

31860449 is a deficient number, since it is larger than the sum of its proper divisors (1).

31860449 is an equidigital number, since it uses as much as digits as its factorization.

31860449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 31860449 is about 5644.5060899958. The cubic root of 31860449 is about 317.0180307988.

The spelling of 31860449 in words is "thirty-one million, eight hundred sixty thousand, four hundred forty-nine".