168722 has 8 divisors (see below), whose sum is σ = 261900. Its totient is φ = 81424.

The previous prime is 168719. The next prime is 168731. The reversal of 168722 is 227861.

It can be written as a sum of positive squares in 2 ways, for example, as 160801 + 7921 = 401^2 + 89^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×168722² = 56934226568, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 6⁶ + 7⁶ + 8² + 2⁸ + 2¹² .

It is a junction number, because it is equal to n+sod(n) for n = 168691 and 168700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397 + ... + 1512.

2¹⁶⁸⁷²² is an apocalyptic number.

168722 is a deficient number, since it is larger than the sum of its proper divisors (93178).

168722 is a wasteful number, since it uses less digits than its factorization.

168722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940.

The product of its digits is 1344, while the sum is 26.

The square root of 168722 is about 410.7578362004. The cubic root of 168722 is about 55.2574159289.

The spelling of 168722 in words is "one hundred sixty-eight thousand, seven hundred twenty-two".