89881720898 has 4 divisors (see below), whose sum is σ = 134822581350. Its totient is φ = 44940860448.

The previous prime is 89881720889. The next prime is 89881720913. The reversal of 89881720898 is 89802718898.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 88936957729 + 944763169 = 298223^2 + 30737^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22470430223 + ... + 22470430226.

Almost surely, 2^89881720898 is an apocalyptic number.

89881720898 is a deficient number, since it is larger than the sum of its proper divisors (44940860452).

89881720898 is a wasteful number, since it uses less digits than its factorization.

89881720898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44940860451.

The product of its (nonzero) digits is 37158912, while the sum is 68.

The spelling of 89881720898 in words is "eighty-nine billion, eight hundred eighty-one million, seven hundred twenty thousand, eight hundred ninety-eight".