22784137 has 2 divisors, whose sum is σ = 22784138. Its totient is φ = 22784136.

The previous prime is 22784093. The next prime is 22784141. The reversal of 22784137 is 73148722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15515721 + 7268416 = 3939^2 + 2696^2 .

It is a cyclic number.

It is not a de Polignac number, because 22784137 - 2¹⁵ = 22751369 is a prime.

It is not a weakly prime, because it can be changed into another prime (22784737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11392068 + 11392069.

It is an arithmetic number, because the mean of its divisors is an integer number (11392069).

Almost surely, 2^22784137 is an apocalyptic number.

It is an amenable number.

22784137 is a deficient number, since it is larger than the sum of its proper divisors (1).

22784137 is an equidigital number, since it uses as much as digits as its factorization.

22784137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 22784137 is about 4773.2731956174. The cubic root of 22784137 is about 283.4942106739.

The spelling of 22784137 in words is "twenty-two million, seven hundred eighty-four thousand, one hundred thirty-seven".