743640311 has 2 divisors, whose sum is σ = 743640312. Its totient is φ = 743640310.

The previous prime is 743640283. The next prime is 743640341. The reversal of 743640311 is 113046347.

It is a weak prime.

It is an emirp because it is prime and its reverse (113046347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-743640311 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (743640341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371820155 + 371820156.

It is an arithmetic number, because the mean of its divisors is an integer number (371820156).

Almost surely, 2^743640311 is an apocalyptic number.

743640311 is a deficient number, since it is larger than the sum of its proper divisors (1).

743640311 is an equidigital number, since it uses as much as digits as its factorization.

743640311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 743640311 is about 27269.7691776076. The cubic root of 743640311 is about 905.9849317780.

Adding to 743640311 its reverse (113046347), we get a palindrome (856686658).

The spelling of 743640311 in words is "seven hundred forty-three million, six hundred forty thousand, three hundred eleven".