22942987 has 2 divisors, whose sum is σ = 22942988. Its totient is φ = 22942986.

The previous prime is 22942981. The next prime is 22942993. The reversal of 22942987 is 78924922.

It is a balanced prime because it is at equal distance from previous prime (22942981) and next prime (22942993).

It is a cyclic number.

It is not a de Polignac number, because 22942987 - 2⁷ = 22942859 is a prime.

It is not a weakly prime, because it can be changed into another prime (22942981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11471493 + 11471494.

It is an arithmetic number, because the mean of its divisors is an integer number (11471494).

Almost surely, 2^22942987 is an apocalyptic number.

22942987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22942987 is an equidigital number, since it uses as much as digits as its factorization.

22942987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 22942987 is about 4789.8838190503. The cubic root of 22942987 is about 284.1515218358.

The spelling of 22942987 in words is "twenty-two million, nine hundred forty-two thousand, nine hundred eighty-seven".