16907938 has 4 divisors (see below), whose sum is σ = 25361910. Its totient is φ = 8453968.

The previous prime is 16907909. The next prime is 16907939. The reversal of 16907938 is 83970961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83970961 = 2389 ⋅35149.

It can be written as a sum of positive squares in only one way, i.e., 12341169 + 4566769 = 3513^2 + 2137^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16907894 and 16907903.

It is not an unprimeable number, because it can be changed into a prime (16907939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4226983 + ... + 4226986.

Almost surely, 2^16907938 is an apocalyptic number.

16907938 is a deficient number, since it is larger than the sum of its proper divisors (8453972).

16907938 is an equidigital number, since it uses as much as digits as its factorization.

16907938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8453971.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 16907938 is about 4111.9263125693. The cubic root of 16907938 is about 256.6631670593.

The spelling of 16907938 in words is "sixteen million, nine hundred seven thousand, nine hundred thirty-eight".