890893139 has 2 divisors, whose sum is σ = 890893140. Its totient is φ = 890893138.

The previous prime is 890893123. The next prime is 890893153. The reversal of 890893139 is 931398098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 890893139 - 2⁴ = 890893123 is a prime.

It is not a weakly prime, because it can be changed into another prime (890893739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445446569 + 445446570.

It is an arithmetic number, because the mean of its divisors is an integer number (445446570).

Almost surely, 2^890893139 is an apocalyptic number.

890893139 is a deficient number, since it is larger than the sum of its proper divisors (1).

890893139 is an equidigital number, since it uses as much as digits as its factorization.

890893139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 890893139 is about 29847.8330704257. The cubic root of 890893139 is about 962.2218282883.

The spelling of 890893139 in words is "eight hundred ninety million, eight hundred ninety-three thousand, one hundred thirty-nine".