73187423 has 2 divisors, whose sum is σ = 73187424. Its totient is φ = 73187422.

The previous prime is 73187407. The next prime is 73187437. The reversal of 73187423 is 32478137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73187423 - 2⁴ = 73187407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73187123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36593711 + 36593712.

It is an arithmetic number, because the mean of its divisors is an integer number (36593712).

Almost surely, 2^73187423 is an apocalyptic number.

73187423 is a deficient number, since it is larger than the sum of its proper divisors (1).

73187423 is an equidigital number, since it uses as much as digits as its factorization.

73187423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 73187423 is about 8554.9648158248. The cubic root of 73187423 is about 418.2912871646.

It can be divided in two parts, 7318 and 7423, that added together give a palindrome (14741).

The spelling of 73187423 in words is "seventy-three million, one hundred eighty-seven thousand, four hundred twenty-three".