74230921 has 2 divisors, whose sum is σ = 74230922. Its totient is φ = 74230920.

The previous prime is 74230903. The next prime is 74230963. The reversal of 74230921 is 12903247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53655625 + 20575296 = 7325^2 + 4536^2 .

It is a cyclic number.

It is not a de Polignac number, because 74230921 - 2⁵ = 74230889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74230921.

It is not a weakly prime, because it can be changed into another prime (74230021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37115460 + 37115461.

It is an arithmetic number, because the mean of its divisors is an integer number (37115461).

Almost surely, 2^74230921 is an apocalyptic number.

It is an amenable number.

74230921 is a deficient number, since it is larger than the sum of its proper divisors (1).

74230921 is an equidigital number, since it uses as much as digits as its factorization.

74230921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 74230921 is about 8615.7368228144. The cubic root of 74230921 is about 420.2698964414.

The spelling of 74230921 in words is "seventy-four million, two hundred thirty thousand, nine hundred twenty-one".