163825705 has 8 divisors (see below), whose sum is σ = 198331272. Its totient is φ = 129900288.

The previous prime is 163825679. The next prime is 163825729. The reversal of 163825705 is 507528361.

163825705 = T₁₆₄₆ + T₁₆₄₇ + ... + T₁₇₅₈.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 162613504 = 1101^2 + 12752^2 .

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 163825705 - 2⁷ = 163825577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144414 + ... + 145543.

It is an arithmetic number, because the mean of its divisors is an integer number (24791409).

Almost surely, 2^163825705 is an apocalyptic number.

It is an amenable number.

163825705 is a deficient number, since it is larger than the sum of its proper divisors (34505567).

163825705 is a wasteful number, since it uses less digits than its factorization.

163825705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290075.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 163825705 is about 12799.4415893819. The cubic root of 163825705 is about 547.1763883421.

The spelling of 163825705 in words is "one hundred sixty-three million, eight hundred twenty-five thousand, seven hundred five".