73561073 has 2 divisors, whose sum is σ = 73561074. Its totient is φ = 73561072.

The previous prime is 73561013. The next prime is 73561121. The reversal of 73561073 is 37016537.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66863329 + 6697744 = 8177^2 + 2588^2 .

It is an emirp because it is prime and its reverse (37016537) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73561073 is a prime.

It is a super-2 number, since 2×73561073² = 10822462921822658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73561013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36780536 + 36780537.

It is an arithmetic number, because the mean of its divisors is an integer number (36780537).

Almost surely, 2^73561073 is an apocalyptic number.

It is an amenable number.

73561073 is a deficient number, since it is larger than the sum of its proper divisors (1).

73561073 is an equidigital number, since it uses as much as digits as its factorization.

73561073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 73561073 is about 8576.7752098327. The cubic root of 73561073 is about 419.0019252479.

The spelling of 73561073 in words is "seventy-three million, five hundred sixty-one thousand, seventy-three".