380831761 has 4 divisors (see below), whose sum is σ = 381763300. Its totient is φ = 379900224.

The previous prime is 380831753. The next prime is 380831777. The reversal of 380831761 is 167138083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167138083 = 7 ⋅23876869.

It can be written as a sum of positive squares in 2 ways, for example, as 152670736 + 228161025 = 12356^2 + 15105^2 .

It is a cyclic number.

It is not a de Polignac number, because 380831761 - 2³ = 380831753 is a prime.

It is a super-2 number, since 2×380831761² = 290065660372722242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 380831761.

It is not an unprimeable number, because it can be changed into a prime (380835761) 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 in 3 ways as a sum of consecutive naturals, for example, 465156 + ... + 465973.

It is an arithmetic number, because the mean of its divisors is an integer number (95440825).

Almost surely, 2^380831761 is an apocalyptic number.

It is an amenable number.

380831761 is a deficient number, since it is larger than the sum of its proper divisors (931539).

380831761 is an equidigital number, since it uses as much as digits as its factorization.

380831761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931538.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 380831761 is about 19514.9112475563. The cubic root of 380831761 is about 724.8437307270.

The spelling of 380831761 in words is "three hundred eighty million, eight hundred thirty-one thousand, seven hundred sixty-one".