163073261 has 4 divisors (see below), whose sum is σ = 175617372. Its totient is φ = 150529152.

The previous prime is 163073213. The next prime is 163073269. The reversal of 163073261 is 162370361.

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 23951236 + 139122025 = 4894^2 + 11795^2 .

It is a cyclic number.

It is not a de Polignac number, because 163073261 - 2¹⁰ = 163072237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163073269) 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, 6272036 + ... + 6272061.

It is an arithmetic number, because the mean of its divisors is an integer number (43904343).

Almost surely, 2^163073261 is an apocalyptic number.

It is an amenable number.

163073261 is a deficient number, since it is larger than the sum of its proper divisors (12544111).

163073261 is a wasteful number, since it uses less digits than its factorization.

163073261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12544110.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 163073261 is about 12770.0141346829. The cubic root of 163073261 is about 546.3373837831.

The spelling of 163073261 in words is "one hundred sixty-three million, seventy-three thousand, two hundred sixty-one".