191478087859 has 2 divisors, whose sum is σ = 191478087860. Its totient is φ = 191478087858.

The previous prime is 191478087847. The next prime is 191478087863. The reversal of 191478087859 is 958780874191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191478087859 - 2³⁵ = 157118349491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191478087794 and 191478087803.

It is not a weakly prime, because it can be changed into another prime (191478087809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95739043929 + 95739043930.

It is an arithmetic number, because the mean of its divisors is an integer number (95739043930).

Almost surely, 2^191478087859 is an apocalyptic number.

191478087859 is a deficient number, since it is larger than the sum of its proper divisors (1).

191478087859 is an equidigital number, since it uses as much as digits as its factorization.

191478087859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40642560, while the sum is 67.

The spelling of 191478087859 in words is "one hundred ninety-one billion, four hundred seventy-eight million, eighty-seven thousand, eight hundred fifty-nine".