1889748139 has 2 divisors, whose sum is σ = 1889748140. Its totient is φ = 1889748138.

The previous prime is 1889748121. The next prime is 1889748167. The reversal of 1889748139 is 9318479881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1889748139 - 2¹¹ = 1889746091 is a prime.

It is a super-2 number, since 2×1889748139² = 7142296057707926642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1889748109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944874069 + 944874070.

It is an arithmetic number, because the mean of its divisors is an integer number (944874070).

Almost surely, 2^1889748139 is an apocalyptic number.

1889748139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889748139 is an equidigital number, since it uses as much as digits as its factorization.

1889748139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 58.

The square root of 1889748139 is about 43471.2334653619. The cubic root of 1889748139 is about 1236.3306673422.

The spelling of 1889748139 in words is "one billion, eight hundred eighty-nine million, seven hundred forty-eight thousand, one hundred thirty-nine".