73613261 has 2 divisors, whose sum is σ = 73613262. Its totient is φ = 73613260.

The previous prime is 73613257. The next prime is 73613263. The reversal of 73613261 is 16231637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64096036 + 9517225 = 8006^2 + 3085^2 .

It is an emirp because it is prime and its reverse (16231637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73613261 - 2² = 73613257 is a prime.

Together with 73613263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73613263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36806630 + 36806631.

It is an arithmetic number, because the mean of its divisors is an integer number (36806631).

Almost surely, 2^73613261 is an apocalyptic number.

It is an amenable number.

73613261 is a deficient number, since it is larger than the sum of its proper divisors (1).

73613261 is an equidigital number, since it uses as much as digits as its factorization.

73613261 is an evil number, because the sum of its binary digits is even.

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

The square root of 73613261 is about 8579.8170726421. The cubic root of 73613261 is about 419.1009889803.

Adding to 73613261 its reverse (16231637), we get a palindrome (89844898).

The spelling of 73613261 in words is "seventy-three million, six hundred thirteen thousand, two hundred sixty-one".