381745169 has 16 divisors (see below), whose sum is σ = 444454080. Its totient is φ = 324803520.

The previous prime is 381745159. The next prime is 381745171. The reversal of 381745169 is 961547183.

It is a cyclic number.

It is not a de Polignac number, because 381745169 - 2⁴ = 381745153 is a prime.

It is a super-2 number, since 2×381745169² = 291458748109677122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (381745159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11747 + ... + 30024.

It is an arithmetic number, because the mean of its divisors is an integer number (27778380).

Almost surely, 2^381745169 is an apocalyptic number.

It is an amenable number.

381745169 is a deficient number, since it is larger than the sum of its proper divisors (62708911).

381745169 is a wasteful number, since it uses less digits than its factorization.

381745169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41840.

The product of its digits is 181440, while the sum is 44.

The square root of 381745169 is about 19538.3000539965. The cubic root of 381745169 is about 725.4227698310.

The spelling of 381745169 in words is "three hundred eighty-one million, seven hundred forty-five thousand, one hundred sixty-nine".