3398151781 has 2 divisors, whose sum is σ = 3398151782. Its totient is φ = 3398151780.

The previous prime is 3398151751. The next prime is 3398151851. The reversal of 3398151781 is 1871518933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2077992225 + 1320159556 = 45585^2 + 36334^2 .

It is a cyclic number.

It is not a de Polignac number, because 3398151781 - 2⁵ = 3398151749 is a prime.

It is a super-2 number, since 2×3398151781² = 23094871053426943922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3398151751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1699075890 + 1699075891.

It is an arithmetic number, because the mean of its divisors is an integer number (1699075891).

Almost surely, 2^3398151781 is an apocalyptic number.

It is an amenable number.

3398151781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3398151781 is an equidigital number, since it uses as much as digits as its factorization.

3398151781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 46.

The square root of 3398151781 is about 58293.6684469248. The cubic root of 3398151781 is about 1503.4220804547.

The spelling of 3398151781 in words is "three billion, three hundred ninety-eight million, one hundred fifty-one thousand, seven hundred eighty-one".