87721703 has 4 divisors (see below), whose sum is σ = 88541640. Its totient is φ = 86901768.

The previous prime is 87721687. The next prime is 87721729. The reversal of 87721703 is 30712778.

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 87721703 - 2⁴ = 87721687 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 (87721303) 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, 409808 + ... + 410021.

It is an arithmetic number, because the mean of its divisors is an integer number (22135410).

Almost surely, 2^87721703 is an apocalyptic number.

87721703 is a deficient number, since it is larger than the sum of its proper divisors (819937).

87721703 is a wasteful number, since it uses less digits than its factorization.

87721703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819936.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 87721703 is about 9365.9864936909. The cubic root of 87721703 is about 444.3266388857.

The spelling of 87721703 in words is "eighty-seven million, seven hundred twenty-one thousand, seven hundred three".