74645401 has 2 divisors, whose sum is σ = 74645402. Its totient is φ = 74645400.

The previous prime is 74645399. The next prime is 74645413. The reversal of 74645401 is 10454647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 29419776 = 6725^2 + 5424^2 .

It is a cyclic number.

It is not a de Polignac number, because 74645401 - 2¹ = 74645399 is a prime.

Together with 74645399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74642401) 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, 37322700 + 37322701.

It is an arithmetic number, because the mean of its divisors is an integer number (37322701).

Almost surely, 2^74645401 is an apocalyptic number.

It is an amenable number.

74645401 is a deficient number, since it is larger than the sum of its proper divisors (1).

74645401 is an equidigital number, since it uses as much as digits as its factorization.

74645401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 74645401 is about 8639.7569988976. The cubic root of 74645401 is about 421.0506593819.

The spelling of 74645401 in words is "seventy-four million, six hundred forty-five thousand, four hundred one".