745218197 has 2 divisors, whose sum is σ = 745218198. Its totient is φ = 745218196.

The previous prime is 745218181. The next prime is 745218263. The reversal of 745218197 is 791812547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733651396 + 11566801 = 27086^2 + 3401^2 .

It is a cyclic number.

It is not a de Polignac number, because 745218197 - 2⁴ = 745218181 is a prime.

It is a super-2 number, since 2×745218197² = 1110700322279861618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745218157) 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, 372609098 + 372609099.

It is an arithmetic number, because the mean of its divisors is an integer number (372609099).

Almost surely, 2^745218197 is an apocalyptic number.

It is an amenable number.

745218197 is a deficient number, since it is larger than the sum of its proper divisors (1).

745218197 is an equidigital number, since it uses as much as digits as its factorization.

745218197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 44.

The square root of 745218197 is about 27298.6848950641. The cubic root of 745218197 is about 906.6252642180.

The spelling of 745218197 in words is "seven hundred forty-five million, two hundred eighteen thousand, one hundred ninety-seven".