22791437 has 2 divisors, whose sum is σ = 22791438. Its totient is φ = 22791436.

The previous prime is 22791427. The next prime is 22791443. The reversal of 22791437 is 73419722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22791076 + 361 = 4774^2 + 19^2 .

It is a cyclic number.

It is not a de Polignac number, because 22791437 - 2¹² = 22787341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22791397 and 22791406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22791427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11395718 + 11395719.

It is an arithmetic number, because the mean of its divisors is an integer number (11395719).

Almost surely, 2^22791437 is an apocalyptic number.

It is an amenable number.

22791437 is a deficient number, since it is larger than the sum of its proper divisors (1).

22791437 is an equidigital number, since it uses as much as digits as its factorization.

22791437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 22791437 is about 4774.0378088155. The cubic root of 22791437 is about 283.5244844670.

The spelling of 22791437 in words is "twenty-two million, seven hundred ninety-one thousand, four hundred thirty-seven".