890135813 has 6 divisors (see below), whose sum is σ = 1035464166. Its totient is φ = 762973512.

The previous prime is 890135809. The next prime is 890135839. The reversal of 890135813 is 318531098.

It can be written as a sum of positive squares in only one way, i.e., 539772289 + 350363524 = 23233^2 + 18718^2 .

It is not a de Polignac number, because 890135813 - 2² = 890135809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890135513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9082970 + ... + 9083067.

It is an arithmetic number, because the mean of its divisors is an integer number (172577361).

Almost surely, 2^890135813 is an apocalyptic number.

It is an amenable number.

890135813 is a deficient number, since it is larger than the sum of its proper divisors (145328353).

890135813 is a wasteful number, since it uses less digits than its factorization.

890135813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18166051 (or 18166044 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 890135813 is about 29835.1439245732. The cubic root of 890135813 is about 961.9490974142.

The spelling of 890135813 in words is "eight hundred ninety million, one hundred thirty-five thousand, eight hundred thirteen".