16575997 has 2 divisors, whose sum is σ = 16575998. Its totient is φ = 16575996.

The previous prime is 16575973. The next prime is 16576009. The reversal of 16575997 is 79957561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13439556 + 3136441 = 3666^2 + 1771^2 .

It is a cyclic number.

It is not a de Polignac number, because 16575997 - 2⁷ = 16575869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16575997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16575967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8287998 + 8287999.

It is an arithmetic number, because the mean of its divisors is an integer number (8287999).

Almost surely, 2^16575997 is an apocalyptic number.

It is an amenable number.

16575997 is a deficient number, since it is larger than the sum of its proper divisors (1).

16575997 is an equidigital number, since it uses as much as digits as its factorization.

16575997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 49.

The square root of 16575997 is about 4071.3630395729. The cubic root of 16575997 is about 254.9724281351.

The spelling of 16575997 in words is "sixteen million, five hundred seventy-five thousand, nine hundred ninety-seven".