8231613987 has 4 divisors (see below), whose sum is σ = 10975485320. Its totient is φ = 5487742656.

The previous prime is 8231613983. The next prime is 8231613989. The reversal of 8231613987 is 7893161328.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8231613987 - 2² = 8231613983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8231613983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371935662 + ... + 1371935667.

It is an arithmetic number, because the mean of its divisors is an integer number (2743871330).

Almost surely, 2^8231613987 is an apocalyptic number.

8231613987 is a deficient number, since it is larger than the sum of its proper divisors (2743871333).

8231613987 is a wasteful number, since it uses less digits than its factorization.

8231613987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743871332.

The product of its digits is 435456, while the sum is 48.

The square root of 8231613987 is about 90728.2424992350. The cubic root of 8231613987 is about 2019.1178374448.

The spelling of 8231613987 in words is "eight billion, two hundred thirty-one million, six hundred thirteen thousand, nine hundred eighty-seven".