73807681 has 2 divisors, whose sum is σ = 73807682. Its totient is φ = 73807680.

The previous prime is 73807633. The next prime is 73807687. The reversal of 73807681 is 18670837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37699600 + 36108081 = 6140^2 + 6009^2 .

It is an emirp because it is prime and its reverse (18670837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73807681 - 2¹⁷ = 73676609 is a prime.

It is a super-2 number, since 2×73807681² = 10895147549195522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73807687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36903840 + 36903841.

It is an arithmetic number, because the mean of its divisors is an integer number (36903841).

Almost surely, 2^73807681 is an apocalyptic number.

It is an amenable number.

73807681 is a deficient number, since it is larger than the sum of its proper divisors (1).

73807681 is an equidigital number, since it uses as much as digits as its factorization.

73807681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 73807681 is about 8591.1396799261. The cubic root of 73807681 is about 419.4696272054.

The spelling of 73807681 in words is "seventy-three million, eight hundred seven thousand, six hundred eighty-one".