1899162321 has 16 divisors (see below), whose sum is σ = 2923799424. Its totient is φ = 1074046464.

The previous prime is 1899162313. The next prime is 1899162337. The reversal of 1899162321 is 1232619981.

1899162321 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1899162321 - 2³ = 1899162313 is a prime.

It is a super-2 number, since 2×1899162321² = 7213635043012214082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1899162311) 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, 464130 + ... + 468203.

It is an arithmetic number, because the mean of its divisors is an integer number (182737464).

Almost surely, 2^1899162321 is an apocalyptic number.

It is an amenable number.

1899162321 is a deficient number, since it is larger than the sum of its proper divisors (1024637103).

1899162321 is an equidigital number, since it uses as much as digits as its factorization.

1899162321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932440.

The product of its digits is 46656, while the sum is 42.

The square root of 1899162321 is about 43579.3795389517. The cubic root of 1899162321 is about 1238.3802822326.

The spelling of 1899162321 in words is "one billion, eight hundred ninety-nine million, one hundred sixty-two thousand, three hundred twenty-one".