87723251 has 8 divisors (see below), whose sum is σ = 109369344. Its totient is φ = 68355720.

The previous prime is 87723239. The next prime is 87723257. The reversal of 87723251 is 15232778.

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 87723251 - 2⁶ = 87723187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87723257) 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, 569555 + ... + 569708.

It is an arithmetic number, because the mean of its divisors is an integer number (13671168).

Almost surely, 2^87723251 is an apocalyptic number.

87723251 is a deficient number, since it is larger than the sum of its proper divisors (21646093).

87723251 is a wasteful number, since it uses less digits than its factorization.

87723251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139281.

The product of its digits is 23520, while the sum is 35.

The square root of 87723251 is about 9366.0691327792. The cubic root of 87723251 is about 444.3292525057.

The spelling of 87723251 in words is "eighty-seven million, seven hundred twenty-three thousand, two hundred fifty-one".