220499969 has 2 divisors, whose sum is σ = 220499970. Its totient is φ = 220499968.

The previous prime is 220499957. The next prime is 220499971. The reversal of 220499969 is 969994022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151609969 + 68890000 = 12313^2 + 8300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220499969 is a prime.

It is a super-2 number, since 2×220499969² = 97240472658001922, which contains 22 as substring.

Together with 220499971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220499269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110249984 + 110249985.

It is an arithmetic number, because the mean of its divisors is an integer number (110249985).

Almost surely, 2^220499969 is an apocalyptic number.

It is an amenable number.

220499969 is a deficient number, since it is larger than the sum of its proper divisors (1).

220499969 is an equidigital number, since it uses as much as digits as its factorization.

220499969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 220499969 is about 14849.2413610932. The cubic root of 220499969 is about 604.1380334862.

The spelling of 220499969 in words is "two hundred twenty million, four hundred ninety-nine thousand, nine hundred sixty-nine".