22507739 has 2 divisors, whose sum is σ = 22507740. Its totient is φ = 22507738.

The previous prime is 22507657. The next prime is 22507747. The reversal of 22507739 is 93770522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22507739 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 22507699 and 22507708.

It is not a weakly prime, because it can be changed into another prime (22507769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11253869 + 11253870.

It is an arithmetic number, because the mean of its divisors is an integer number (11253870).

Almost surely, 2^22507739 is an apocalyptic number.

22507739 is a deficient number, since it is larger than the sum of its proper divisors (1).

22507739 is an equidigital number, since it uses as much as digits as its factorization.

22507739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 22507739 is about 4744.2321823452. The cubic root of 22507739 is about 282.3431724110.

The spelling of 22507739 in words is "twenty-two million, five hundred seven thousand, seven hundred thirty-nine".