16968537 has 6 divisors (see below), whose sum is σ = 24510122. Its totient is φ = 11312352.

The previous prime is 16968521. The next prime is 16968557. The reversal of 16968537 is 73586961.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 6702921 = 3204^2 + 2589^2 .

It is not a de Polignac number, because 16968537 - 2⁴ = 16968521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16968492 and 16968501.

It is not an unprimeable number, because it can be changed into a prime (16968517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 942688 + ... + 942705.

Almost surely, 2^16968537 is an apocalyptic number.

It is an amenable number.

16968537 is a deficient number, since it is larger than the sum of its proper divisors (7541585).

16968537 is a wasteful number, since it uses less digits than its factorization.

16968537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885399 (or 1885396 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 16968537 is about 4119.2884094222. The cubic root of 16968537 is about 256.9694331969.

The spelling of 16968537 in words is "sixteen million, nine hundred sixty-eight thousand, five hundred thirty-seven".