3198906257 has 2 divisors, whose sum is σ = 3198906258. Its totient is φ = 3198906256.

The previous prime is 3198906251. The next prime is 3198906259. The reversal of 3198906257 is 7526098913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2382318481 + 816587776 = 48809^2 + 28576^2 .

It is a cyclic number.

It is not a de Polignac number, because 3198906257 - 2⁴ = 3198906241 is a prime.

Together with 3198906259, 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 (3198906251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599453128 + 1599453129.

It is an arithmetic number, because the mean of its divisors is an integer number (1599453129).

Almost surely, 2^3198906257 is an apocalyptic number.

It is an amenable number.

3198906257 is a deficient number, since it is larger than the sum of its proper divisors (1).

3198906257 is an equidigital number, since it uses as much as digits as its factorization.

3198906257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 3198906257 is about 56558.8742550628. The cubic root of 3198906257 is about 1473.4446893385. Note that the first 3 decimals are identical.

The spelling of 3198906257 in words is "three billion, one hundred ninety-eight million, nine hundred six thousand, two hundred fifty-seven".