261723803 has 8 divisors (see below), whose sum is σ = 300544320. Its totient is φ = 225407880.

The previous prime is 261723799. The next prime is 261723809. The reversal of 261723803 is 308327162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261723803 - 2² = 261723799 is a prime.

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 261723803.

It is not an unprimeable number, because it can be changed into a prime (261723809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625925 + ... + 626342.

It is an arithmetic number, because the mean of its divisors is an integer number (37568040).

Almost surely, 2^261723803 is an apocalyptic number.

261723803 is a deficient number, since it is larger than the sum of its proper divisors (38820517).

261723803 is a wasteful number, since it uses less digits than its factorization.

261723803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252297.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 261723803 is about 16177.8800527140. The cubic root of 261723803 is about 639.6578599326.

The spelling of 261723803 in words is "two hundred sixty-one million, seven hundred twenty-three thousand, eight hundred three".