740390393 has 2 divisors, whose sum is σ = 740390394. Its totient is φ = 740390392.

The previous prime is 740390363. The next prime is 740390437. The reversal of 740390393 is 393093047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 461734144 + 278656249 = 21488^2 + 16693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-740390393 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (740390323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370195196 + 370195197.

It is an arithmetic number, because the mean of its divisors is an integer number (370195197).

Almost surely, 2^740390393 is an apocalyptic number.

It is an amenable number.

740390393 is a deficient number, since it is larger than the sum of its proper divisors (1).

740390393 is an equidigital number, since it uses as much as digits as its factorization.

740390393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 740390393 is about 27210.1156373875. The cubic root of 740390393 is about 904.6632011910.

The spelling of 740390393 in words is "seven hundred forty million, three hundred ninety thousand, three hundred ninety-three".