74402749 has 2 divisors, whose sum is σ = 74402750. Its totient is φ = 74402748.

The previous prime is 74402747. The next prime is 74402767. The reversal of 74402749 is 94720447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63313849 + 11088900 = 7957^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 74402749 - 2¹ = 74402747 is a prime.

Together with 74402747, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74402747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37201374 + 37201375.

It is an arithmetic number, because the mean of its divisors is an integer number (37201375).

Almost surely, 2^74402749 is an apocalyptic number.

It is an amenable number.

74402749 is a deficient number, since it is larger than the sum of its proper divisors (1).

74402749 is an equidigital number, since it uses as much as digits as its factorization.

74402749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 74402749 is about 8625.7028119452. The cubic root of 74402749 is about 420.5939235291.

The spelling of 74402749 in words is "seventy-four million, four hundred two thousand, seven hundred forty-nine".