8186418997 has 4 divisors (see below), whose sum is σ = 8186616736. Its totient is φ = 8186221260.

The previous prime is 8186418973. The next prime is 8186419001. The reversal of 8186418997 is 7998146818.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8186418997 - 2³¹ = 6038935349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8186418967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10353 + ... + 128374.

It is an arithmetic number, because the mean of its divisors is an integer number (2046654184).

Almost surely, 2^8186418997 is an apocalyptic number.

It is an amenable number.

8186418997 is a deficient number, since it is larger than the sum of its proper divisors (197739).

8186418997 is a wasteful number, since it uses less digits than its factorization.

8186418997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197738.

The product of its digits is 6967296, while the sum is 61.

The square root of 8186418997 is about 90478.8317619099. The cubic root of 8186418997 is about 2015.4157878665.

The spelling of 8186418997 in words is "eight billion, one hundred eighty-six million, four hundred eighteen thousand, nine hundred ninety-seven".