73390081 has 2 divisors, whose sum is σ = 73390082. Its totient is φ = 73390080.

The previous prime is 73390069. The next prime is 73390117. The reversal of 73390081 is 18009337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 23814400 = 7041^2 + 4880^2 .

It is a cyclic number.

It is not a de Polignac number, because 73390081 - 2¹¹ = 73388033 is a prime.

It is a super-2 number, since 2×73390081² = 10772207978373122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73390021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36695040 + 36695041.

It is an arithmetic number, because the mean of its divisors is an integer number (36695041).

Almost surely, 2^73390081 is an apocalyptic number.

It is an amenable number.

73390081 is a deficient number, since it is larger than the sum of its proper divisors (1).

73390081 is an equidigital number, since it uses as much as digits as its factorization.

73390081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 73390081 is about 8566.8010949245. The cubic root of 73390081 is about 418.6770180674.

The spelling of 73390081 in words is "seventy-three million, three hundred ninety thousand, eighty-one".