73474781 has 2 divisors, whose sum is σ = 73474782. Its totient is φ = 73474780.

The previous prime is 73474769. The next prime is 73474783. The reversal of 73474781 is 18747437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58767556 + 14707225 = 7666^2 + 3835^2 .

It is a cyclic number.

It is not a de Polignac number, because 73474781 - 2⁶ = 73474717 is a prime.

It is a super-2 number, since 2×73474781² = 10797086885995922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 73474783, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73474783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36737390 + 36737391.

It is an arithmetic number, because the mean of its divisors is an integer number (36737391).

Almost surely, 2^73474781 is an apocalyptic number.

It is an amenable number.

73474781 is a deficient number, since it is larger than the sum of its proper divisors (1).

73474781 is an equidigital number, since it uses as much as digits as its factorization.

73474781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 41.

The square root of 73474781 is about 8571.7431716075. The cubic root of 73474781 is about 418.8380221586.

The spelling of 73474781 in words is "seventy-three million, four hundred seventy-four thousand, seven hundred eighty-one".