163868749 has 8 divisors (see below), whose sum is σ = 188174880. Its totient is φ = 141130800.

The previous prime is 163868741. The next prime is 163868827. The reversal of 163868749 is 947868361.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 163868749 - 2³ = 163868741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163868696 and 163868705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163868741) 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, 391822 + ... + 392239.

It is an arithmetic number, because the mean of its divisors is an integer number (23521860).

Almost surely, 2^163868749 is an apocalyptic number.

163868749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

163868749 is a deficient number, since it is larger than the sum of its proper divisors (24306131).

163868749 is a wasteful number, since it uses less digits than its factorization.

163868749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784091.

The product of its digits is 1741824, while the sum is 52.

The square root of 163868749 is about 12801.1229585533. The cubic root of 163868749 is about 547.2243063372.

The spelling of 163868749 in words is "one hundred sixty-three million, eight hundred sixty-eight thousand, seven hundred forty-nine".