713281991 has 4 divisors (see below), whose sum is σ = 714600984. Its totient is φ = 711963000.
The previous prime is 713281981. The next prime is 713282071. The reversal of 713281991 is 199182317.
It is a happy number.
713281991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 713281991 - 214 = 713265607 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (713281931) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658685 + ... + 659766.
It is an arithmetic number, because the mean of its divisors is an integer number (178650246).
Almost surely, 2713281991 is an apocalyptic number.
713281991 is a deficient number, since it is larger than the sum of its proper divisors (1318993).
713281991 is a wasteful number, since it uses less digits than its factorization.
713281991 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1318992.
The product of its digits is 27216, while the sum is 41.
The square root of 713281991 is about 26707.3396466215. The cubic root of 713281991 is about 893.4846306484.
The spelling of 713281991 in words is "seven hundred thirteen million, two hundred eighty-one thousand, nine hundred ninety-one".
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