22328987 has 2 divisors, whose sum is σ = 22328988. Its totient is φ = 22328986.

The previous prime is 22328951. The next prime is 22328993. The reversal of 22328987 is 78982322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22328987 - 2⁸ = 22328731 is a prime.

It is a super-3 number, since 3×22328987³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22328947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11164493 + 11164494.

It is an arithmetic number, because the mean of its divisors is an integer number (11164494).

Almost surely, 2^22328987 is an apocalyptic number.

22328987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22328987 is an equidigital number, since it uses as much as digits as its factorization.

22328987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 22328987 is about 4725.3557538031. The cubic root of 22328987 is about 281.5937471373.

The spelling of 22328987 in words is "twenty-two million, three hundred twenty-eight thousand, nine hundred eighty-seven".