8194991259 has 32 divisors (see below), whose sum is σ = 13668680704. Its totient is φ = 4251761280.

The previous prime is 8194991257. The next prime is 8194991261. The reversal of 8194991259 is 9521994918.

It is an interprime number because it is at equal distance from previous prime (8194991257) and next prime (8194991261).

It is not a de Polignac number, because 8194991259 - 2¹ = 8194991257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8194991199 and 8194991208.

It is not an unprimeable number, because it can be changed into a prime (8194991257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229399 + ... + 262704.

It is an arithmetic number, because the mean of its divisors is an integer number (427146272).

Almost surely, 2^8194991259 is an apocalyptic number.

8194991259 is a deficient number, since it is larger than the sum of its proper divisors (5473689445).

8194991259 is a wasteful number, since it uses less digits than its factorization.

8194991259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492187.

The product of its digits is 2099520, while the sum is 57.

The square root of 8194991259 is about 90526.1910112206. The cubic root of 8194991259 is about 2016.1190113136.

The spelling of 8194991259 in words is "eight billion, one hundred ninety-four million, nine hundred ninety-one thousand, two hundred fifty-nine".