881974391 has 2 divisors, whose sum is σ = 881974392. Its totient is φ = 881974390.

The previous prime is 881974339. The next prime is 881974403. The reversal of 881974391 is 193479188.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881974391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881979391) 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, 440987195 + 440987196.

It is an arithmetic number, because the mean of its divisors is an integer number (440987196).

Almost surely, 2^881974391 is an apocalyptic number.

881974391 is a deficient number, since it is larger than the sum of its proper divisors (1).

881974391 is an equidigital number, since it uses as much as digits as its factorization.

881974391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 881974391 is about 29698.0536567634. The cubic root of 881974391 is about 959.0001130827. Note that the first 3 decimals are identical.

The spelling of 881974391 in words is "eight hundred eighty-one million, nine hundred seventy-four thousand, three hundred ninety-one".