74854781 has 2 divisors, whose sum is σ = 74854782. Its totient is φ = 74854780.

The previous prime is 74854753. The next prime is 74854789. The reversal of 74854781 is 18745847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68326756 + 6528025 = 8266^2 + 2555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74854781 is a prime.

It is a super-2 number, since 2×74854781² = 11206476477115922, which contains 22 as substring.

It is a Sophie Germain prime.

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 (74854789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37427390 + 37427391.

It is an arithmetic number, because the mean of its divisors is an integer number (37427391).

Almost surely, 2^74854781 is an apocalyptic number.

It is an amenable number.

74854781 is a deficient number, since it is larger than the sum of its proper divisors (1).

74854781 is an equidigital number, since it uses as much as digits as its factorization.

74854781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 44.

The square root of 74854781 is about 8651.8657525415. The cubic root of 74854781 is about 421.4439735715.

The spelling of 74854781 in words is "seventy-four million, eight hundred fifty-four thousand, seven hundred eighty-one".