869983493 has 2 divisors, whose sum is σ = 869983494. Its totient is φ = 869983492.

The previous prime is 869983451. The next prime is 869983531. The reversal of 869983493 is 394389968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 831630244 + 38353249 = 28838^2 + 6193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869983493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869983693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434991746 + 434991747.

It is an arithmetic number, because the mean of its divisors is an integer number (434991747).

Almost surely, 2^869983493 is an apocalyptic number.

It is an amenable number.

869983493 is a deficient number, since it is larger than the sum of its proper divisors (1).

869983493 is an equidigital number, since it uses as much as digits as its factorization.

869983493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 59.

The square root of 869983493 is about 29495.4825863216. The cubic root of 869983493 is about 954.6342332553.

The spelling of 869983493 in words is "eight hundred sixty-nine million, nine hundred eighty-three thousand, four hundred ninety-three".