73234781 has 2 divisors, whose sum is σ = 73234782. Its totient is φ = 73234780.

The previous prime is 73234739. The next prime is 73234823. The reversal of 73234781 is 18743237.

It is a balanced prime because it is at equal distance from previous prime (73234739) and next prime (73234823).

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 12924025 = 7766^2 + 3595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73234781 is a prime.

It is a super-2 number, since 2×73234781² = 10726666296235922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73236781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36617390 + 36617391.

It is an arithmetic number, because the mean of its divisors is an integer number (36617391).

Almost surely, 2^73234781 is an apocalyptic number.

It is an amenable number.

73234781 is a deficient number, since it is larger than the sum of its proper divisors (1).

73234781 is an equidigital number, since it uses as much as digits as its factorization.

73234781 is an evil number, because the sum of its binary digits is even.

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

The square root of 73234781 is about 8557.7322346519. The cubic root of 73234781 is about 418.3814901291.

The spelling of 73234781 in words is "seventy-three million, two hundred thirty-four thousand, seven hundred eighty-one".