163720485 has 12 divisors (see below), whose sum is σ = 283782252. Its totient is φ = 87317568.

The previous prime is 163720483. The next prime is 163720493. The reversal of 163720485 is 584027361.

It can be written as a sum of positive squares in 2 ways, for example, as 86825124 + 76895361 = 9318^2 + 8769^2 .

It is not a de Polignac number, because 163720485 - 2¹ = 163720483 is a prime.

It is a super-3 number, since 3×163720485³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163720481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1819072 + ... + 1819161.

It is an arithmetic number, because the mean of its divisors is an integer number (23648521).

Almost surely, 2^163720485 is an apocalyptic number.

163720485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163720485 is a deficient number, since it is larger than the sum of its proper divisors (120061767).

163720485 is a wasteful number, since it uses less digits than its factorization.

163720485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638244 (or 3638241 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 163720485 is about 12795.3305936189. The cubic root of 163720485 is about 547.0592186343.

It can be divided in two parts, 1637 and 20485, that added together give a palindrome (22122).

The spelling of 163720485 in words is "one hundred sixty-three million, seven hundred twenty thousand, four hundred eighty-five".