73653161 has 4 divisors (see below), whose sum is σ = 73746372. Its totient is φ = 73559952.

The previous prime is 73653157. The next prime is 73653187. The reversal of 73653161 is 16135637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16135637 = 7 ⋅2305091.

It can be written as a sum of positive squares in 2 ways, for example, as 34515625 + 39137536 = 5875^2 + 6256^2 .

It is a cyclic number.

It is not a de Polignac number, because 73653161 - 2² = 73653157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73653761) 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, 45410 + ... + 47003.

It is an arithmetic number, because the mean of its divisors is an integer number (18436593).

Almost surely, 2^73653161 is an apocalyptic number.

It is an amenable number.

73653161 is a deficient number, since it is larger than the sum of its proper divisors (93211).

73653161 is an equidigital number, since it uses as much as digits as its factorization.

73653161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93210.

The product of its digits is 11340, while the sum is 32.

The square root of 73653161 is about 8582.1419820462. The cubic root of 73653161 is about 419.1766959426.

Adding to 73653161 its reverse (16135637), we get a palindrome (89788798).

The spelling of 73653161 in words is "seventy-three million, six hundred fifty-three thousand, one hundred sixty-one".