89773987 has 4 divisors (see below), whose sum is σ = 91295640. Its totient is φ = 88252336.

The previous prime is 89773979. The next prime is 89774039. The reversal of 89773987 is 78937798.

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 89773987 - 2³ = 89773979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89773087) 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, 760738 + ... + 760855.

It is an arithmetic number, because the mean of its divisors is an integer number (22823910).

Almost surely, 2^89773987 is an apocalyptic number.

89773987 is a deficient number, since it is larger than the sum of its proper divisors (1521653).

89773987 is a wasteful number, since it uses less digits than its factorization.

89773987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521652.

The product of its digits is 5334336, while the sum is 58.

The square root of 89773987 is about 9474.9135616110. The cubic root of 89773987 is about 447.7650284474.

The spelling of 89773987 in words is "eighty-nine million, seven hundred seventy-three thousand, nine hundred eighty-seven".