22780837 has 2 divisors, whose sum is σ = 22780838. Its totient is φ = 22780836.

The previous prime is 22780817. The next prime is 22780843. The reversal of 22780837 is 73808722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 3147076 = 4431^2 + 1774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22780837 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22780796 and 22780805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22780817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11390418 + 11390419.

It is an arithmetic number, because the mean of its divisors is an integer number (11390419).

Almost surely, 2^22780837 is an apocalyptic number.

It is an amenable number.

22780837 is a deficient number, since it is larger than the sum of its proper divisors (1).

22780837 is an equidigital number, since it uses as much as digits as its factorization.

22780837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 22780837 is about 4772.9275083538. The cubic root of 22780837 is about 283.4805231382.

The spelling of 22780837 in words is "twenty-two million, seven hundred eighty thousand, eight hundred thirty-seven".