168994737 has 12 divisors (see below), whose sum is σ = 244762804. Its totient is φ = 112358880.

The previous prime is 168994711. The next prime is 168994741. The reversal of 168994737 is 737499861.

It is a happy number.

168994737 is a `hidden beast` number, since 168 + 9 + 9 + 473 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 93721761 + 75272976 = 9681^2 + 8676^2 .

It is not a de Polignac number, because 168994737 - 2⁶ = 168994673 is a prime.

It is a super-2 number, since 2×168994737² = 57118442267398338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168994747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21814 + ... + 28527.

Almost surely, 2^168994737 is an apocalyptic number.

It is an amenable number.

168994737 is a deficient number, since it is larger than the sum of its proper divisors (75768067).

168994737 is a wasteful number, since it uses less digits than its factorization.

168994737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50720 (or 50717 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 168994737 is about 12999.7975753471. The cubic root of 168994737 is about 552.8717420693.

The spelling of 168994737 in words is "one hundred sixty-eight million, nine hundred ninety-four thousand, seven hundred thirty-seven".