839490887 has 2 divisors, whose sum is σ = 839490888. Its totient is φ = 839490886.

The previous prime is 839490803. The next prime is 839490901. The reversal of 839490887 is 788094938.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 839490887 - 2¹⁶ = 839425351 is a prime.

It is a super-3 number, since 3×839490887³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839490187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419745443 + 419745444.

It is an arithmetic number, because the mean of its divisors is an integer number (419745444).

Almost surely, 2^839490887 is an apocalyptic number.

839490887 is a deficient number, since it is larger than the sum of its proper divisors (1).

839490887 is an equidigital number, since it uses as much as digits as its factorization.

839490887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The square root of 839490887 is about 28973.9691274772. The cubic root of 839490887 is about 943.3481353697.

The spelling of 839490887 in words is "eight hundred thirty-nine million, four hundred ninety thousand, eight hundred eighty-seven".