890381279 has 2 divisors, whose sum is σ = 890381280. Its totient is φ = 890381278.

The previous prime is 890381227. The next prime is 890381281. The reversal of 890381279 is 972183098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 890381279 - 2¹⁶ = 890315743 is a prime.

It is a Sophie Germain prime.

Together with 890381281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890381299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445190639 + 445190640.

It is an arithmetic number, because the mean of its divisors is an integer number (445190640).

Almost surely, 2^890381279 is an apocalyptic number.

890381279 is a deficient number, since it is larger than the sum of its proper divisors (1).

890381279 is an equidigital number, since it uses as much as digits as its factorization.

890381279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 890381279 is about 29839.2573466566. The cubic root of 890381279 is about 962.0375124224.

The spelling of 890381279 in words is "eight hundred ninety million, three hundred eighty-one thousand, two hundred seventy-nine".