74043731 has 2 divisors, whose sum is σ = 74043732. Its totient is φ = 74043730.

The previous prime is 74043727. The next prime is 74043733. The reversal of 74043731 is 13734047.

It is a strong prime.

It is an emirp because it is prime and its reverse (13734047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74043731 - 2² = 74043727 is a prime.

It is a super-2 number, since 2×74043731² = 10964948200800722, which contains 22 as substring.

Together with 74043733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74043694 and 74043703.

It is not a weakly prime, because it can be changed into another prime (74043733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37021865 + 37021866.

It is an arithmetic number, because the mean of its divisors is an integer number (37021866).

Almost surely, 2^74043731 is an apocalyptic number.

74043731 is a deficient number, since it is larger than the sum of its proper divisors (1).

74043731 is an equidigital number, since it uses as much as digits as its factorization.

74043731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 74043731 is about 8604.8667043714. The cubic root of 74043731 is about 419.9163306498.

Adding to 74043731 its reverse (13734047), we get a palindrome (87777778).

The spelling of 74043731 in words is "seventy-four million, forty-three thousand, seven hundred thirty-one".