16938437 has 2 divisors, whose sum is σ = 16938438. Its totient is φ = 16938436.

The previous prime is 16938433. The next prime is 16938451. The reversal of 16938437 is 73483961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10042561 + 6895876 = 3169^2 + 2626^2 .

It is a cyclic number.

It is not a de Polignac number, because 16938437 - 2² = 16938433 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16938394 and 16938403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16938433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469218 + 8469219.

It is an arithmetic number, because the mean of its divisors is an integer number (8469219).

Almost surely, 2^16938437 is an apocalyptic number.

It is an amenable number.

16938437 is a deficient number, since it is larger than the sum of its proper divisors (1).

16938437 is an equidigital number, since it uses as much as digits as its factorization.

16938437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 16938437 is about 4115.6332441072. The cubic root of 16938437 is about 256.8173997019.

The spelling of 16938437 in words is "sixteen million, nine hundred thirty-eight thousand, four hundred thirty-seven".