70723 has 4 divisors (see below), whose sum is σ = 71280. Its totient is φ = 70168.
The previous prime is 70717. The next prime is 70729. The reversal of 70723 is 32707.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is an interprime number because it is at equal distance from previous prime (70717) and next prime (70729).
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-70723 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 70723.
It is not an unprimeable number, because it can be changed into a prime (70729) 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, 18 + ... + 376.
It is an arithmetic number, because the mean of its divisors is an integer number (17820).
270723 is an apocalyptic number.
70723 is a deficient number, since it is larger than the sum of its proper divisors (557).
70723 is a wasteful number, since it uses less digits than its factorization.
70723 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 556.
The product of its (nonzero) digits is 294, while the sum is 19.
The square root of 70723 is about 265.9379626905. The cubic root of 70723 is about 41.3542572405.
Adding to 70723 its product of nonzero digits (294), we get a palindrome (71017).
It can be divided in two parts, 707 and 23, that multiplied together give a palindrome (16261).
The spelling of 70723 in words is "seventy thousand, seven hundred twenty-three", and thus it is an iban number.
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