87044869 has 4 divisors (see below), whose sum is σ = 89852800. Its totient is φ = 84236940.

The previous prime is 87044861. The next prime is 87044887. The reversal of 87044869 is 96844078.

It is a happy number.

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 87044869 - 2³ = 87044861 is a prime.

It is a super-2 number, since 2×87044869² = 15153618438454322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87044861) 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, 1403919 + ... + 1403980.

It is an arithmetic number, because the mean of its divisors is an integer number (22463200).

Almost surely, 2^87044869 is an apocalyptic number.

It is an amenable number.

87044869 is a deficient number, since it is larger than the sum of its proper divisors (2807931).

87044869 is a wasteful number, since it uses less digits than its factorization.

87044869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807930.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 87044869 is about 9329.7839739192. The cubic root of 87044869 is about 443.1809240493.

The spelling of 87044869 in words is "eighty-seven million, forty-four thousand, eight hundred sixty-nine".