16538737 has 2 divisors, whose sum is σ = 16538738. Its totient is φ = 16538736.

The previous prime is 16538713. The next prime is 16538801. The reversal of 16538737 is 73783561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15023376 + 1515361 = 3876^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 16538737 - 2¹⁵ = 16505969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16538737.

It is not a weakly prime, because it can be changed into another prime (16530737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8269368 + 8269369.

It is an arithmetic number, because the mean of its divisors is an integer number (8269369).

Almost surely, 2^16538737 is an apocalyptic number.

It is an amenable number.

16538737 is a deficient number, since it is larger than the sum of its proper divisors (1).

16538737 is an equidigital number, since it uses as much as digits as its factorization.

16538737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 16538737 is about 4066.7846021150. The cubic root of 16538737 is about 254.7812400394.

The spelling of 16538737 in words is "sixteen million, five hundred thirty-eight thousand, seven hundred thirty-seven".