1868280361 has 4 divisors (see below), whose sum is σ = 1868510592. Its totient is φ = 1868050132.

The previous prime is 1868280353. The next prime is 1868280373. The reversal of 1868280361 is 1630828681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1630828681 = 199 ⋅8195119.

It is a cyclic number.

It is not a de Polignac number, because 1868280361 - 2³ = 1868280353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868280391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102481 + ... + 119326.

It is an arithmetic number, because the mean of its divisors is an integer number (467127648).

Almost surely, 2^1868280361 is an apocalyptic number.

It is an amenable number.

1868280361 is a deficient number, since it is larger than the sum of its proper divisors (230231).

1868280361 is an equidigital number, since it uses as much as digits as its factorization.

1868280361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230230.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 1868280361 is about 43223.6088382264. The cubic root of 1868280361 is about 1231.6312023772.

The spelling of 1868280361 in words is "one billion, eight hundred sixty-eight million, two hundred eighty thousand, three hundred sixty-one".