73404161 has 2 divisors, whose sum is σ = 73404162. Its totient is φ = 73404160.

The previous prime is 73404151. The next prime is 73404173. The reversal of 73404161 is 16140437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 10042561 = 7960^2 + 3169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73404161 is a prime.

It is a super-2 number, since 2×73404161² = 10776341704227842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73404161.

It is not a weakly prime, because it can be changed into another prime (73404101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36702080 + 36702081.

It is an arithmetic number, because the mean of its divisors is an integer number (36702081).

Almost surely, 2^73404161 is an apocalyptic number.

It is an amenable number.

73404161 is a deficient number, since it is larger than the sum of its proper divisors (1).

73404161 is an equidigital number, since it uses as much as digits as its factorization.

73404161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 73404161 is about 8567.6228325014. The cubic root of 73404161 is about 418.7037909655.

Adding to 73404161 its reverse (16140437), we get a palindrome (89544598).

The spelling of 73404161 in words is "seventy-three million, four hundred four thousand, one hundred sixty-one".