745648993 has 2 divisors, whose sum is σ = 745648994. Its totient is φ = 745648992.

The previous prime is 745648931. The next prime is 745649011. The reversal of 745648993 is 399846547.

745648993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744634944 + 1014049 = 27288^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 745648993 - 2⁹ = 745648481 is a prime.

It is not a weakly prime, because it can be changed into another prime (745642993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372824496 + 372824497.

It is an arithmetic number, because the mean of its divisors is an integer number (372824497).

Almost surely, 2^745648993 is an apocalyptic number.

It is an amenable number.

745648993 is a deficient number, since it is larger than the sum of its proper divisors (1).

745648993 is an equidigital number, since it uses as much as digits as its factorization.

745648993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 55.

The square root of 745648993 is about 27306.5741717997. The cubic root of 745648993 is about 906.7999313167.

The spelling of 745648993 in words is "seven hundred forty-five million, six hundred forty-eight thousand, nine hundred ninety-three".