743780731 has 2 divisors, whose sum is σ = 743780732. Its totient is φ = 743780730.

The previous prime is 743780717. The next prime is 743780797. The reversal of 743780731 is 137087347.

It is a weak prime.

It is an emirp because it is prime and its reverse (137087347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 743780731 - 2¹³ = 743772539 is a prime.

It is a super-2 number, since 2×743780731² = 1106419551613788722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (743780701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371890365 + 371890366.

It is an arithmetic number, because the mean of its divisors is an integer number (371890366).

Almost surely, 2^743780731 is an apocalyptic number.

743780731 is a deficient number, since it is larger than the sum of its proper divisors (1).

743780731 is an equidigital number, since it uses as much as digits as its factorization.

743780731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 743780731 is about 27272.3437019997. The cubic root of 743780731 is about 906.0419532509.

The spelling of 743780731 in words is "seven hundred forty-three million, seven hundred eighty thousand, seven hundred thirty-one".