87723691 has 8 divisors (see below), whose sum is σ = 95881968. Its totient is φ = 79596000.

The previous prime is 87723683. The next prime is 87723697. The reversal of 87723691 is 19632778.

It is a happy number.

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

It is not a de Polignac number, because 87723691 - 2³ = 87723683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87723697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420 + ... + 13321.

It is an arithmetic number, because the mean of its divisors is an integer number (11985246).

Almost surely, 2^87723691 is an apocalyptic number.

87723691 is a deficient number, since it is larger than the sum of its proper divisors (8158277).

87723691 is a wasteful number, since it uses less digits than its factorization.

87723691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15293.

The product of its digits is 127008, while the sum is 43.

The square root of 87723691 is about 9366.0926217927. The cubic root of 87723691 is about 444.3299953895.

The spelling of 87723691 in words is "eighty-seven million, seven hundred twenty-three thousand, six hundred ninety-one".