16725557 has 2 divisors, whose sum is σ = 16725558. Its totient is φ = 16725556.

The previous prime is 16725539. The next prime is 16725559. The reversal of 16725557 is 75552761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9278116 + 7447441 = 3046^2 + 2729^2 .

It is an emirp because it is prime and its reverse (75552761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16725557 - 2¹² = 16721461 is a prime.

Together with 16725559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16725557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16725559) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8362778 + 8362779.

It is an arithmetic number, because the mean of its divisors is an integer number (8362779).

Almost surely, 2^16725557 is an apocalyptic number.

It is an amenable number.

16725557 is a deficient number, since it is larger than the sum of its proper divisors (1).

16725557 is an equidigital number, since it uses as much as digits as its factorization.

16725557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73500, while the sum is 38.

The square root of 16725557 is about 4089.6891079885. The cubic root of 16725557 is about 255.7369785958.

The spelling of 16725557 in words is "sixteen million, seven hundred twenty-five thousand, five hundred fifty-seven".