743720613 has 4 divisors (see below), whose sum is σ = 991627488. Its totient is φ = 495813740.

The previous prime is 743720603. The next prime is 743720623. The reversal of 743720613 is 316027347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (743720603) and next prime (743720623).

It is a cyclic number.

It is not a de Polignac number, because 743720613 - 2¹⁰ = 743719589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743720603) 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 in 3 ways as a sum of consecutive naturals, for example, 123953433 + ... + 123953438.

It is an arithmetic number, because the mean of its divisors is an integer number (247906872).

Almost surely, 2^743720613 is an apocalyptic number.

It is an amenable number.

743720613 is a deficient number, since it is larger than the sum of its proper divisors (247906875).

743720613 is a wasteful number, since it uses less digits than its factorization.

743720613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247906874.

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 743720613 is about 27271.2415008925. The cubic root of 743720613 is about 906.0175415323.

The spelling of 743720613 in words is "seven hundred forty-three million, seven hundred twenty thousand, six hundred thirteen".