745340821237 has 2 divisors, whose sum is σ = 745340821238. Its totient is φ = 745340821236.

The previous prime is 745340821231. The next prime is 745340821283. The reversal of 745340821237 is 732128043547.

It is an a-pointer prime, because the next prime (745340821283) can be obtained adding 745340821237 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376908817041 + 368432004196 = 613929^2 + 606986^2 .

It is a cyclic number.

It is not a de Polignac number, because 745340821237 - 2³ = 745340821229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745340821231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372670410618 + 372670410619.

It is an arithmetic number, because the mean of its divisors is an integer number (372670410619).

Almost surely, 2^745340821237 is an apocalyptic number.

It is an amenable number.

745340821237 is a deficient number, since it is larger than the sum of its proper divisors (1).

745340821237 is an equidigital number, since it uses as much as digits as its factorization.

745340821237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 745340821237 in words is "seven hundred forty-five billion, three hundred forty million, eight hundred twenty-one thousand, two hundred thirty-seven".