163290287 has 8 divisors (see below), whose sum is σ = 177569136. Its totient is φ = 149530752.

The previous prime is 163290277. The next prime is 163290289. The reversal of 163290287 is 782092361.

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 163290287 - 2⁶ = 163290223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163290287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163290289) 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, 129173 + ... + 130430.

It is an arithmetic number, because the mean of its divisors is an integer number (22196142).

Almost surely, 2^163290287 is an apocalyptic number.

163290287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

163290287 is a deficient number, since it is larger than the sum of its proper divisors (14278849).

163290287 is a wasteful number, since it uses less digits than its factorization.

163290287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259657.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 163290287 is about 12778.5087940651. The cubic root of 163290287 is about 546.5796406596.

It can be divided in two parts, 1632 and 90287, that added together give a palindrome (91919).

The spelling of 163290287 in words is "one hundred sixty-three million, two hundred ninety thousand, two hundred eighty-seven".