22906087 has 2 divisors, whose sum is σ = 22906088. Its totient is φ = 22906086.

The previous prime is 22906073. The next prime is 22906097. The reversal of 22906087 is 78060922.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22906087 is a prime.

It is equal to p_1442689 and since 22906087 and 1442689 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22906007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11453043 + 11453044.

It is an arithmetic number, because the mean of its divisors is an integer number (11453044).

Almost surely, 2^22906087 is an apocalyptic number.

22906087 is a deficient number, since it is larger than the sum of its proper divisors (1).

22906087 is an equidigital number, since it uses as much as digits as its factorization.

22906087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 22906087 is about 4786.0304010735. The cubic root of 22906087 is about 283.9991031844. Note that the first 3 decimals are identical.

The spelling of 22906087 in words is "twenty-two million, nine hundred six thousand, eighty-seven".