16938769 has 2 divisors, whose sum is σ = 16938770. Its totient is φ = 16938768.

The previous prime is 16938751. The next prime is 16938773. The reversal of 16938769 is 96783961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16769025 + 169744 = 4095^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 16938769 - 2²³ = 8550161 is a prime.

It is a super-2 number, since 2×16938769² = 573843790470722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16930769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469384 + 8469385.

It is an arithmetic number, because the mean of its divisors is an integer number (8469385).

Almost surely, 2^16938769 is an apocalyptic number.

It is an amenable number.

16938769 is a deficient number, since it is larger than the sum of its proper divisors (1).

16938769 is an equidigital number, since it uses as much as digits as its factorization.

16938769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 16938769 is about 4115.6735779214. The cubic root of 16938769 is about 256.8190775982.

The spelling of 16938769 in words is "sixteen million, nine hundred thirty-eight thousand, seven hundred sixty-nine".