168649274 has 4 divisors (see below), whose sum is σ = 252973914. Its totient is φ = 84324636.

The previous prime is 168649267. The next prime is 168649289. The reversal of 168649274 is 472946861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161925625 + 6723649 = 12725^2 + 2593^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42162317 + ... + 42162320.

Almost surely, 2^168649274 is an apocalyptic number.

168649274 is a deficient number, since it is larger than the sum of its proper divisors (84324640).

168649274 is an equidigital number, since it uses as much as digits as its factorization.

168649274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84324639.

The product of its digits is 580608, while the sum is 47.

The square root of 168649274 is about 12986.5035325141. The cubic root of 168649274 is about 552.4947539479.

The spelling of 168649274 in words is "one hundred sixty-eight million, six hundred forty-nine thousand, two hundred seventy-four".