74350621 has 2 divisors, whose sum is σ = 74350622. Its totient is φ = 74350620.

The previous prime is 74350607. The next prime is 74350631. The reversal of 74350621 is 12605347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44702596 + 29648025 = 6686^2 + 5445^2 .

It is a cyclic number.

It is not a de Polignac number, because 74350621 - 2⁹ = 74350109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74350621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74350631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37175310 + 37175311.

It is an arithmetic number, because the mean of its divisors is an integer number (37175311).

Almost surely, 2^74350621 is an apocalyptic number.

It is an amenable number.

74350621 is a deficient number, since it is larger than the sum of its proper divisors (1).

74350621 is an equidigital number, since it uses as much as digits as its factorization.

74350621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 74350621 is about 8622.6806156786. The cubic root of 74350621 is about 420.4956751775.

Adding to 74350621 its reverse (12605347), we get a palindrome (86955968).

The spelling of 74350621 in words is "seventy-four million, three hundred fifty thousand, six hundred twenty-one".