220487429 has 2 divisors, whose sum is σ = 220487430. Its totient is φ = 220487428.

The previous prime is 220487417. The next prime is 220487431. The reversal of 220487429 is 924784022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219336100 + 1151329 = 14810^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 220487429 - 2⁴ = 220487413 is a prime.

It is a super-2 number, since 2×220487429² = 97229412694060082, which contains 22 as substring.

Together with 220487431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 220487392 and 220487401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220487129) 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, 110243714 + 110243715.

It is an arithmetic number, because the mean of its divisors is an integer number (110243715).

Almost surely, 2^220487429 is an apocalyptic number.

It is an amenable number.

220487429 is a deficient number, since it is larger than the sum of its proper divisors (1).

220487429 is an equidigital number, since it uses as much as digits as its factorization.

220487429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 220487429 is about 14848.8191112964. The cubic root of 220487429 is about 604.1265806735.

The spelling of 220487429 in words is "two hundred twenty million, four hundred eighty-seven thousand, four hundred twenty-nine".