1899641139 has 32 divisors (see below), whose sum is σ = 2923941888. Its totient is φ = 1085700000.

The previous prime is 1899641129. The next prime is 1899641141. The reversal of 1899641139 is 9311469981.

It is not a de Polignac number, because 1899641139 - 2⁷ = 1899641011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1899641091 and 1899641100.

It is not an unprimeable number, because it can be changed into a prime (1899641129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36264 + ... + 71514.

It is an arithmetic number, because the mean of its divisors is an integer number (91373184).

Almost surely, 2^1899641139 is an apocalyptic number.

1899641139 is a deficient number, since it is larger than the sum of its proper divisors (1024300749).

1899641139 is a wasteful number, since it uses less digits than its factorization.

1899641139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35359.

The product of its digits is 419904, while the sum is 51.

The square root of 1899641139 is about 43584.8728230335. The cubic root of 1899641139 is about 1238.4843472263.

The spelling of 1899641139 in words is "one billion, eight hundred ninety-nine million, six hundred forty-one thousand, one hundred thirty-nine".