168749893 has 8 divisors (see below), whose sum is σ = 182020608. Its totient is φ = 155520624.

The previous prime is 168749863. The next prime is 168749929. The reversal of 168749893 is 398947861.

168749893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168749893 is a prime.

It is a super-2 number, since 2×168749893² = 56953052775022898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168749813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1621 + ... + 18442.

It is an arithmetic number, because the mean of its divisors is an integer number (22752576).

Almost surely, 2^168749893 is an apocalyptic number.

168749893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

168749893 is a deficient number, since it is larger than the sum of its proper divisors (13270715).

168749893 is a wasteful number, since it uses less digits than its factorization.

168749893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20723.

The product of its digits is 2612736, while the sum is 55.

The square root of 168749893 is about 12990.3769383340. The cubic root of 168749893 is about 552.6046079986.

The spelling of 168749893 in words is "one hundred sixty-eight million, seven hundred forty-nine thousand, eight hundred ninety-three".