1890690139 has 8 divisors (see below), whose sum is σ = 2155900320. Its totient is φ = 1642590336.

The previous prime is 1890690089. The next prime is 1890690163. The reversal of 1890690139 is 9310960981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1890690139 - 2⁹ = 1890689627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890697139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4277359 + ... + 4277800.

It is an arithmetic number, because the mean of its divisors is an integer number (269487540).

Almost surely, 2^1890690139 is an apocalyptic number.

1890690139 is a deficient number, since it is larger than the sum of its proper divisors (265210181).

1890690139 is a wasteful number, since it uses less digits than its factorization.

1890690139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8555189.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 1890690139 is about 43482.0668666980. The cubic root of 1890690139 is about 1236.5360615610.

The spelling of 1890690139 in words is "one billion, eight hundred ninety million, six hundred ninety thousand, one hundred thirty-nine".