3198731 has 2 divisors, whose sum is σ = 3198732. Its totient is φ = 3198730.

The previous prime is 3198721. The next prime is 3198733. The reversal of 3198731 is 1378913.

3198731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3198731 - 2⁶ = 3198667 is a prime.

It is a super-2 number, since 2×3198731² = 20463760020722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3198733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3198733) 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, 1599365 + 1599366.

It is an arithmetic number, because the mean of its divisors is an integer number (1599366).

Almost surely, 2^3198731 is an apocalyptic number.

3198731 is a deficient number, since it is larger than the sum of its proper divisors (1).

3198731 is an equidigital number, since it uses as much as digits as its factorization.

3198731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 3198731 is about 1788.4996505451. The cubic root of 3198731 is about 147.3417780536.

The spelling of 3198731 in words is "three million, one hundred ninety-eight thousand, seven hundred thirty-one".