190856839 has 2 divisors, whose sum is σ = 190856840. Its totient is φ = 190856838.

The previous prime is 190856797. The next prime is 190856849. The reversal of 190856839 is 938658091.

190856839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190856839 - 2¹⁵ = 190824071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190856792 and 190856801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190856849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95428419 + 95428420.

It is an arithmetic number, because the mean of its divisors is an integer number (95428420).

Almost surely, 2^190856839 is an apocalyptic number.

190856839 is a deficient number, since it is larger than the sum of its proper divisors (1).

190856839 is an equidigital number, since it uses as much as digits as its factorization.

190856839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 190856839 is about 13815.0946069870. The cubic root of 190856839 is about 575.7526014048.

The spelling of 190856839 in words is "one hundred ninety million, eight hundred fifty-six thousand, eight hundred thirty-nine".