73618231 has 2 divisors, whose sum is σ = 73618232. Its totient is φ = 73618230.

The previous prime is 73618229. The next prime is 73618241. The reversal of 73618231 is 13281637.

It is a weak prime.

It is an emirp because it is prime and its reverse (13281637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73618231 - 2¹ = 73618229 is a prime.

It is a super-2 number, since 2×73618231² = 10839287871138722, which contains 22 as substring.

Together with 73618229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 73618193 and 73618202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73618241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36809115 + 36809116.

It is an arithmetic number, because the mean of its divisors is an integer number (36809116).

Almost surely, 2^73618231 is an apocalyptic number.

73618231 is a deficient number, since it is larger than the sum of its proper divisors (1).

73618231 is an equidigital number, since it uses as much as digits as its factorization.

73618231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 73618231 is about 8580.1067009682. The cubic root of 73618231 is about 419.1104206371.

Adding to 73618231 its reverse (13281637), we get a palindrome (86899868).

The spelling of 73618231 in words is "seventy-three million, six hundred eighteen thousand, two hundred thirty-one".