16389797 has 2 divisors, whose sum is σ = 16389798. Its totient is φ = 16389796.

The previous prime is 16389757. The next prime is 16389811. The reversal of 16389797 is 79798361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8375236 + 8014561 = 2894^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 16389797 - 2⁶ = 16389733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16389707) 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, 8194898 + 8194899.

It is an arithmetic number, because the mean of its divisors is an integer number (8194899).

Almost surely, 2^16389797 is an apocalyptic number.

It is an amenable number.

16389797 is a deficient number, since it is larger than the sum of its proper divisors (1).

16389797 is an equidigital number, since it uses as much as digits as its factorization.

16389797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 16389797 is about 4048.4314246384. The cubic root of 16389797 is about 254.0141197433.

The spelling of 16389797 in words is "sixteen million, three hundred eighty-nine thousand, seven hundred ninety-seven".