89981555 has 8 divisors (see below), whose sum is σ = 108280800. Its totient is φ = 71783296.

The previous prime is 89981533. The next prime is 89981557. The reversal of 89981555 is 55518998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89981555 - 2⁶ = 89981491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89981557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23270 + ... + 26859.

It is an arithmetic number, because the mean of its divisors is an integer number (13535100).

Almost surely, 2^89981555 is an apocalyptic number.

89981555 is a deficient number, since it is larger than the sum of its proper divisors (18299245).

89981555 is a wasteful number, since it uses less digits than its factorization.

89981555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50493.

The product of its digits is 648000, while the sum is 50.

The square root of 89981555 is about 9485.8607938342. The cubic root of 89981555 is about 448.1098579305.

The spelling of 89981555 in words is "eighty-nine million, nine hundred eighty-one thousand, five hundred fifty-five".