74428493 has 2 divisors, whose sum is σ = 74428494. Its totient is φ = 74428492.

The previous prime is 74428481. The next prime is 74428517. The reversal of 74428493 is 39482447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74425129 + 3364 = 8627^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 74428493 - 2⁶ = 74428429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74428493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74428463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37214246 + 37214247.

It is an arithmetic number, because the mean of its divisors is an integer number (37214247).

Almost surely, 2^74428493 is an apocalyptic number.

It is an amenable number.

74428493 is a deficient number, since it is larger than the sum of its proper divisors (1).

74428493 is an equidigital number, since it uses as much as digits as its factorization.

74428493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 74428493 is about 8627.1949670794. The cubic root of 74428493 is about 420.6424276570.

The spelling of 74428493 in words is "seventy-four million, four hundred twenty-eight thousand, four hundred ninety-three".