74387843 has 2 divisors, whose sum is σ = 74387844. Its totient is φ = 74387842.

The previous prime is 74387809. The next prime is 74387851. The reversal of 74387843 is 34878347.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74387843 - 2⁸ = 74387587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74387794 and 74387803.

It is not a weakly prime, because it can be changed into another prime (74380843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37193921 + 37193922.

It is an arithmetic number, because the mean of its divisors is an integer number (37193922).

Almost surely, 2^74387843 is an apocalyptic number.

74387843 is a deficient number, since it is larger than the sum of its proper divisors (1).

74387843 is an equidigital number, since it uses as much as digits as its factorization.

74387843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 44.

The square root of 74387843 is about 8624.8387231298. The cubic root of 74387843 is about 420.5658341022.

The spelling of 74387843 in words is "seventy-four million, three hundred eighty-seven thousand, eight hundred forty-three".