73051813 has 2 divisors, whose sum is σ = 73051814. Its totient is φ = 73051812.

The previous prime is 73051799. The next prime is 73051819. The reversal of 73051813 is 31815037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72471169 + 580644 = 8513^2 + 762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73051813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73051819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36525906 + 36525907.

It is an arithmetic number, because the mean of its divisors is an integer number (36525907).

Almost surely, 2^73051813 is an apocalyptic number.

It is an amenable number.

73051813 is a deficient number, since it is larger than the sum of its proper divisors (1).

73051813 is an equidigital number, since it uses as much as digits as its factorization.

73051813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 73051813 is about 8547.0353339623. The cubic root of 73051813 is about 418.0327748390.

The spelling of 73051813 in words is "seventy-three million, fifty-one thousand, eight hundred thirteen".