163009537 has 4 divisors (see below), whose sum is σ = 163854340. Its totient is φ = 162164736.

The previous prime is 163009513. The next prime is 163009577. The reversal of 163009537 is 735900361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87684496 + 75325041 = 9364^2 + 8679^2 .

It is a cyclic number.

It is not a de Polignac number, because 163009537 - 2⁷ = 163009409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163009577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422112 + ... + 422497.

It is an arithmetic number, because the mean of its divisors is an integer number (40963585).

Almost surely, 2^163009537 is an apocalyptic number.

It is an amenable number.

163009537 is a deficient number, since it is larger than the sum of its proper divisors (844803).

163009537 is an equidigital number, since it uses as much as digits as its factorization.

163009537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844802.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 163009537 is about 12767.5188270862. The cubic root of 163009537 is about 546.2662105794.

Adding to 163009537 its reverse (735900361), we get a palindrome (898909898).

The spelling of 163009537 in words is "one hundred sixty-three million, nine thousand, five hundred thirty-seven".