89778993 has 4 divisors (see below), whose sum is σ = 119705328. Its totient is φ = 59852660.

The previous prime is 89778991. The next prime is 89779031. The reversal of 89778993 is 39987798.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89778993 - 2¹ = 89778991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89778991) 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, 14963163 + ... + 14963168.

It is an arithmetic number, because the mean of its divisors is an integer number (29926332).

Almost surely, 2^89778993 is an apocalyptic number.

It is an amenable number.

89778993 is a deficient number, since it is larger than the sum of its proper divisors (29926335).

89778993 is a wasteful number, since it uses less digits than its factorization.

89778993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29926334.

The product of its digits is 6858432, while the sum is 60.

The square root of 89778993 is about 9475.1777292038. The cubic root of 89778993 is about 447.7733510887.

The spelling of 89778993 in words is "eighty-nine million, seven hundred seventy-eight thousand, nine hundred ninety-three".