89928993 has 16 divisors (see below), whose sum is σ = 149492736. Its totient is φ = 46716240.

The previous prime is 89928983. The next prime is 89929003. The reversal of 89928993 is 39982998.

It is an interprime number because it is at equal distance from previous prime (89928983) and next prime (89929003).

It is not a de Polignac number, because 89928993 - 2¹² = 89924897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89928973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194421 + ... + 194882.

It is an arithmetic number, because the mean of its divisors is an integer number (9343296).

Almost surely, 2^89928993 is an apocalyptic number.

It is an amenable number.

89928993 is a deficient number, since it is larger than the sum of its proper divisors (59563743).

89928993 is a wasteful number, since it uses less digits than its factorization.

89928993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389324.

The product of its digits is 2519424, while the sum is 57.

The square root of 89928993 is about 9483.0898445602. The cubic root of 89928993 is about 448.0225876818.

It can be divided in two parts, 899 and 28993, that added together give a palindrome (29892).

The spelling of 89928993 in words is "eighty-nine million, nine hundred twenty-eight thousand, nine hundred ninety-three".