1899334139 has 2 divisors, whose sum is σ = 1899334140. Its totient is φ = 1899334138.

The previous prime is 1899334121. The next prime is 1899334147. The reversal of 1899334139 is 9314339981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1899334139 - 2²⁸ = 1630898683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1899334109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949667069 + 949667070.

It is an arithmetic number, because the mean of its divisors is an integer number (949667070).

Almost surely, 2^1899334139 is an apocalyptic number.

1899334139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1899334139 is an equidigital number, since it uses as much as digits as its factorization.

1899334139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 50.

The square root of 1899334139 is about 43581.3508166050. The cubic root of 1899334139 is about 1238.4176266984.

The spelling of 1899334139 in words is "one billion, eight hundred ninety-nine million, three hundred thirty-four thousand, one hundred thirty-nine".