73787761 has 2 divisors, whose sum is σ = 73787762. Its totient is φ = 73787760.

The previous prime is 73787759. The next prime is 73787767. The reversal of 73787761 is 16778737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73427761 + 360000 = 8569^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 73787761 - 2¹ = 73787759 is a prime.

Together with 73787759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (73787767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36893880 + 36893881.

It is an arithmetic number, because the mean of its divisors is an integer number (36893881).

Almost surely, 2^73787761 is an apocalyptic number.

It is an amenable number.

73787761 is a deficient number, since it is larger than the sum of its proper divisors (1).

73787761 is an equidigital number, since it uses as much as digits as its factorization.

73787761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345744, while the sum is 46.

The square root of 73787761 is about 8589.9802677305. The cubic root of 73787761 is about 419.4318868389.

The spelling of 73787761 in words is "seventy-three million, seven hundred eighty-seven thousand, seven hundred sixty-one".