87869943 has 18 divisors (see below), whose sum is σ = 145178072. Its totient is φ = 50168880.

The previous prime is 87869933. The next prime is 87869963. The reversal of 87869943 is 34996878.

It is not a de Polignac number, because 87869943 - 2⁵ = 87869911 is a prime.

It is a super-2 number, since 2×87869943² = 15442253765646498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87869943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87869933) 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 17 ways as a sum of consecutive naturals, for example, 73813 + ... + 74993.

Almost surely, 2^87869943 is an apocalyptic number.

87869943 is a deficient number, since it is larger than the sum of its proper divisors (57308129).

87869943 is an equidigital number, since it uses as much as digits as its factorization.

87869943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375 (or 1191 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 87869943 is about 9373.8968951018. The cubic root of 87869943 is about 444.5767856979.

The spelling of 87869943 in words is "eighty-seven million, eight hundred sixty-nine thousand, nine hundred forty-three".