31898849 has 2 divisors, whose sum is σ = 31898850. Its totient is φ = 31898848.

The previous prime is 31898843. The next prime is 31898863. The reversal of 31898849 is 94889813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27667600 + 4231249 = 5260^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 31898849 - 2²⁴ = 15121633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31898797 and 31898806.

It is not a weakly prime, because it can be changed into another prime (31898843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15949424 + 15949425.

It is an arithmetic number, because the mean of its divisors is an integer number (15949425).

Almost surely, 2^31898849 is an apocalyptic number.

It is an amenable number.

31898849 is a deficient number, since it is larger than the sum of its proper divisors (1).

31898849 is an equidigital number, since it uses as much as digits as its factorization.

31898849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 31898849 is about 5647.9066033354. The cubic root of 31898849 is about 317.1453423016.

The spelling of 31898849 in words is "thirty-one million, eight hundred ninety-eight thousand, eight hundred forty-nine".