738290921 has 2 divisors, whose sum is σ = 738290922. Its totient is φ = 738290920.

The previous prime is 738290897. The next prime is 738290957. The reversal of 738290921 is 129092837.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418775296 + 319515625 = 20464^2 + 17875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-738290921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (738290981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369145460 + 369145461.

It is an arithmetic number, because the mean of its divisors is an integer number (369145461).

Almost surely, 2^738290921 is an apocalyptic number.

It is an amenable number.

738290921 is a deficient number, since it is larger than the sum of its proper divisors (1).

738290921 is an equidigital number, since it uses as much as digits as its factorization.

738290921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 738290921 is about 27171.5093618297. The cubic root of 738290921 is about 903.8072954588.

The spelling of 738290921 in words is "seven hundred thirty-eight million, two hundred ninety thousand, nine hundred twenty-one".