74374021 has 2 divisors, whose sum is σ = 74374022. Its totient is φ = 74374020.

The previous prime is 74373983. The next prime is 74374049. The reversal of 74374021 is 12047347.

It is an a-pointer prime, because the next prime (74374049) can be obtained adding 74374021 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69472225 + 4901796 = 8335^2 + 2214^2 .

It is a cyclic number.

It is not a de Polignac number, because 74374021 - 2²⁵ = 40819589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74371021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37187010 + 37187011.

It is an arithmetic number, because the mean of its divisors is an integer number (37187011).

Almost surely, 2^74374021 is an apocalyptic number.

It is an amenable number.

74374021 is a deficient number, since it is larger than the sum of its proper divisors (1).

74374021 is an equidigital number, since it uses as much as digits as its factorization.

74374021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 74374021 is about 8624.0373955590. The cubic root of 74374021 is about 420.5397840524.

The spelling of 74374021 in words is "seventy-four million, three hundred seventy-four thousand, twenty-one".