74747243 has 2 divisors, whose sum is σ = 74747244. Its totient is φ = 74747242.

The previous prime is 74747221. The next prime is 74747251. The reversal of 74747243 is 34274747.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74747243 - 2¹⁰ = 74746219 is a prime.

It is a super-2 number, since 2×74747243² = 11174300672202098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74747197 and 74747206.

It is not a weakly prime, because it can be changed into another prime (74047243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37373621 + 37373622.

It is an arithmetic number, because the mean of its divisors is an integer number (37373622).

Almost surely, 2^74747243 is an apocalyptic number.

74747243 is a deficient number, since it is larger than the sum of its proper divisors (1).

74747243 is an equidigital number, since it uses as much as digits as its factorization.

74747243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 38.

The square root of 74747243 is about 8645.6487899984. The cubic root of 74747243 is about 421.2420583345.

The spelling of 74747243 in words is "seventy-four million, seven hundred forty-seven thousand, two hundred forty-three".