338749691 has 6 divisors (see below), whose sum is σ = 394055820. Its totient is φ = 290356836.

The previous prime is 338749673. The next prime is 338749699. The reversal of 338749691 is 196947833.

It is not a de Polignac number, because 338749691 - 2¹⁰ = 338748667 is a prime.

It is a super-2 number, since 2×338749691² = 229502706305190962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338749699) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3456581 + ... + 3456678.

It is an arithmetic number, because the mean of its divisors is an integer number (65675970).

Almost surely, 2^338749691 is an apocalyptic number.

338749691 is a deficient number, since it is larger than the sum of its proper divisors (55306129).

338749691 is an equidigital number, since it uses as much as digits as its factorization.

338749691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913273 (or 6913266 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 338749691 is about 18405.1539249201. The cubic root of 338749691 is about 697.0966075719.

The spelling of 338749691 in words is "three hundred thirty-eight million, seven hundred forty-nine thousand, six hundred ninety-one".