22198739 has 2 divisors, whose sum is σ = 22198740. Its totient is φ = 22198738.

The previous prime is 22198733. The next prime is 22198747. The reversal of 22198739 is 93789122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22198739 - 2¹² = 22194643 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22198696 and 22198705.

It is not a weakly prime, because it can be changed into another prime (22198733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11099369 + 11099370.

It is an arithmetic number, because the mean of its divisors is an integer number (11099370).

Almost surely, 2^22198739 is an apocalyptic number.

22198739 is a deficient number, since it is larger than the sum of its proper divisors (1).

22198739 is an equidigital number, since it uses as much as digits as its factorization.

22198739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 22198739 is about 4711.5537776831. The cubic root of 22198739 is about 281.0451542791.

The spelling of 22198739 in words is "twenty-two million, one hundred ninety-eight thousand, seven hundred thirty-nine".