1868031361 has 6 divisors (see below), whose sum is σ = 2173016130. Its totient is φ = 1601169696.

The previous prime is 1868031331. The next prime is 1868031401. The reversal of 1868031361 is 1631308681.

It can be written as a sum of positive squares in only one way, i.e., 1799456400 + 68574961 = 42420^2 + 8281^2 .

It is not a de Polignac number, because 1868031361 - 2⁵ = 1868031329 is a prime.

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 1868031361.

It is not an unprimeable number, because it can be changed into a prime (1868031331) 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, 19061496 + ... + 19061593.

It is an arithmetic number, because the mean of its divisors is an integer number (362169355).

Almost surely, 2^1868031361 is an apocalyptic number.

It is an amenable number.

1868031361 is a deficient number, since it is larger than the sum of its proper divisors (304984769).

1868031361 is an equidigital number, since it uses as much as digits as its factorization.

1868031361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38123103 (or 38123096 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1868031361 is about 43220.7283719282. The cubic root of 1868031361 is about 1231.5764836456.

The spelling of 1868031361 in words is "one billion, eight hundred sixty-eight million, thirty-one thousand, three hundred sixty-one".