73344781 has 2 divisors, whose sum is σ = 73344782. Its totient is φ = 73344780.

The previous prime is 73344773. The next prime is 73344787. The reversal of 73344781 is 18744337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67798756 + 5546025 = 8234^2 + 2355^2 .

It is a cyclic number.

It is not a de Polignac number, because 73344781 - 2³ = 73344773 is a prime.

It is a super-2 number, since 2×73344781² = 10758913799875922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73344781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73344787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36672390 + 36672391.

It is an arithmetic number, because the mean of its divisors is an integer number (36672391).

Almost surely, 2^73344781 is an apocalyptic number.

It is an amenable number.

73344781 is a deficient number, since it is larger than the sum of its proper divisors (1).

73344781 is an equidigital number, since it uses as much as digits as its factorization.

73344781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 73344781 is about 8564.1567594247. The cubic root of 73344781 is about 418.5908575933.

The spelling of 73344781 in words is "seventy-three million, three hundred forty-four thousand, seven hundred eighty-one".