740343917 has 2 divisors, whose sum is σ = 740343918. Its totient is φ = 740343916.

The previous prime is 740343913. The next prime is 740343971. The reversal of 740343917 is 719343047.

It is a happy number.

Together with next prime (740343971) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641659561 + 98684356 = 25331^2 + 9934^2 .

It is a cyclic number.

It is not a de Polignac number, because 740343917 - 2² = 740343913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (740343913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370171958 + 370171959.

It is an arithmetic number, because the mean of its divisors is an integer number (370171959).

Almost surely, 2^740343917 is an apocalyptic number.

It is an amenable number.

740343917 is a deficient number, since it is larger than the sum of its proper divisors (1).

740343917 is an equidigital number, since it uses as much as digits as its factorization.

740343917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 740343917 is about 27209.2616033585. The cubic root of 740343917 is about 904.6442715348.

The spelling of 740343917 in words is "seven hundred forty million, three hundred forty-three thousand, nine hundred seventeen".