31198049 has 2 divisors, whose sum is σ = 31198050. Its totient is φ = 31198048.

The previous prime is 31198033. The next prime is 31198061. The reversal of 31198049 is 94089113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 14876449 = 4040^2 + 3857^2 .

It is a cyclic number.

It is not a de Polignac number, because 31198049 - 2⁴ = 31198033 is a prime.

It is a super-2 number, since 2×31198049² = 1946636522812802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31198099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15599024 + 15599025.

It is an arithmetic number, because the mean of its divisors is an integer number (15599025).

Almost surely, 2^31198049 is an apocalyptic number.

It is an amenable number.

31198049 is a deficient number, since it is larger than the sum of its proper divisors (1).

31198049 is an equidigital number, since it uses as much as digits as its factorization.

31198049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 31198049 is about 5585.5213722624. The cubic root of 31198049 is about 314.8056212390.

The spelling of 31198049 in words is "thirty-one million, one hundred ninety-eight thousand, forty-nine".