74721343 has 2 divisors, whose sum is σ = 74721344. Its totient is φ = 74721342.

The previous prime is 74721337. The next prime is 74721359. The reversal of 74721343 is 34312747.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74721343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74721643) 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, 37360671 + 37360672.

It is an arithmetic number, because the mean of its divisors is an integer number (37360672).

Almost surely, 2^74721343 is an apocalyptic number.

74721343 is a deficient number, since it is larger than the sum of its proper divisors (1).

74721343 is an equidigital number, since it uses as much as digits as its factorization.

74721343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 31.

The square root of 74721343 is about 8644.1507969262. The cubic root of 74721343 is about 421.1933991054.

The spelling of 74721343 in words is "seventy-four million, seven hundred twenty-one thousand, three hundred forty-three".