89200991 has 8 divisors (see below), whose sum is σ = 102432000. Its totient is φ = 76823640.

The previous prime is 89200973. The next prime is 89200997. The reversal of 89200991 is 19900298.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89200991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89200997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213191 + ... + 213608.

It is an arithmetic number, because the mean of its divisors is an integer number (12804000).

Almost surely, 2^89200991 is an apocalyptic number.

89200991 is a deficient number, since it is larger than the sum of its proper divisors (13231009).

89200991 is a wasteful number, since it uses less digits than its factorization.

89200991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426829.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 89200991 is about 9444.6276263281. The cubic root of 89200991 is about 446.8103518458.

The spelling of 89200991 in words is "eighty-nine million, two hundred thousand, nine hundred ninety-one".