22987993 has 8 divisors (see below), whose sum is σ = 26717760. Its totient is φ = 19369680.

The previous prime is 22987969. The next prime is 22987997. The reversal of 22987993 is 39978922.

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-22987993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22987997) 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, 27418 + ... + 28243.

It is an arithmetic number, because the mean of its divisors is an integer number (3339720).

Almost surely, 2^22987993 is an apocalyptic number.

It is an amenable number.

22987993 is a deficient number, since it is larger than the sum of its proper divisors (3729767).

22987993 is an equidigital number, since it uses as much as digits as its factorization.

22987993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55727.

The product of its digits is 489888, while the sum is 49.

The square root of 22987993 is about 4794.5795436096. The cubic root of 22987993 is about 284.3372019641.

The spelling of 22987993 in words is "twenty-two million, nine hundred eighty-seven thousand, nine hundred ninety-three".