89904871 has 4 divisors (see below), whose sum is σ = 102748432. Its totient is φ = 77061312.

The previous prime is 89904839. The next prime is 89904883. The reversal of 89904871 is 17840998.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 89904871 - 2⁵ = 89904839 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 (89904811) 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, 6421770 + ... + 6421783.

It is an arithmetic number, because the mean of its divisors is an integer number (25687108).

Almost surely, 2^89904871 is an apocalyptic number.

89904871 is a deficient number, since it is larger than the sum of its proper divisors (12843561).

89904871 is a wasteful number, since it uses less digits than its factorization.

89904871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12843560.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 89904871 is about 9481.8179164124. The cubic root of 89904871 is about 447.9825258251.

It can be divided in two parts, 8990 and 4871, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 89904871 in words is "eighty-nine million, nine hundred four thousand, eight hundred seventy-one".