818949887 has 10 divisors (see below), whose sum is σ = 955387488. Its totient is φ = 701954988.

The previous prime is 818949863. The next prime is 818949899. The reversal of 818949887 is 788949818.

It is not a de Polignac number, because 818949887 - 2¹⁸ = 818687743 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 (818943887) 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 9 ways as a sum of consecutive naturals, for example, 168143 + ... + 172944.

Almost surely, 2^818949887 is an apocalyptic number.

818949887 is a deficient number, since it is larger than the sum of its proper divisors (136437601).

818949887 is an frugal number, since it uses more digits than its factorization.

818949887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341115 (or 341094 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 62.

The square root of 818949887 is about 28617.3004841477. The cubic root of 818949887 is about 935.5904406435.

The spelling of 818949887 in words is "eight hundred eighteen million, nine hundred forty-nine thousand, eight hundred eighty-seven".