73374781 has 2 divisors, whose sum is σ = 73374782. Its totient is φ = 73374780.

The previous prime is 73374773. The next prime is 73374793. The reversal of 73374781 is 18747337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69572281 + 3802500 = 8341^2 + 1950^2 .

It is a cyclic number.

It is not a de Polignac number, because 73374781 - 2³ = 73374773 is a prime.

It is a super-2 number, since 2×73374781² = 10767716973595922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73374481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36687390 + 36687391.

It is an arithmetic number, because the mean of its divisors is an integer number (36687391).

Almost surely, 2^73374781 is an apocalyptic number.

It is an amenable number.

73374781 is a deficient number, since it is larger than the sum of its proper divisors (1).

73374781 is an equidigital number, since it uses as much as digits as its factorization.

73374781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 40.

The square root of 73374781 is about 8565.9080662823. The cubic root of 73374781 is about 418.6479214761.

The spelling of 73374781 in words is "seventy-three million, three hundred seventy-four thousand, seven hundred eighty-one".