740128897 has 2 divisors, whose sum is σ = 740128898. Its totient is φ = 740128896.

The previous prime is 740128889. The next prime is 740128919. The reversal of 740128897 is 798821047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447068736 + 293060161 = 21144^2 + 17119^2 .

It is a cyclic number.

It is not a de Polignac number, because 740128897 - 2³ = 740128889 is a prime.

It is a super-3 number, since 3×740128897³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (740128397) 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, 370064448 + 370064449.

It is an arithmetic number, because the mean of its divisors is an integer number (370064449).

Almost surely, 2^740128897 is an apocalyptic number.

It is an amenable number.

740128897 is a deficient number, since it is larger than the sum of its proper divisors (1).

740128897 is an equidigital number, since it uses as much as digits as its factorization.

740128897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 740128897 is about 27205.3100882897. The cubic root of 740128897 is about 904.5566836624.

The spelling of 740128897 in words is "seven hundred forty million, one hundred twenty-eight thousand, eight hundred ninety-seven".