87785023 has 4 divisors (see below), whose sum is σ = 87821280. Its totient is φ = 87748768.

The previous prime is 87785021. The next prime is 87785029. The reversal of 87785023 is 32058778.

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 87785023 - 2¹ = 87785021 is a prime.

It is a super-2 number, since 2×87785023² = 15412420526221058, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87785021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14215 + ... + 19432.

It is an arithmetic number, because the mean of its divisors is an integer number (21955320).

Almost surely, 2^87785023 is an apocalyptic number.

87785023 is a deficient number, since it is larger than the sum of its proper divisors (36257).

87785023 is a wasteful number, since it uses less digits than its factorization.

87785023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36256.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 87785023 is about 9369.3662005495. The cubic root of 87785023 is about 444.4335223404.

The spelling of 87785023 in words is "eighty-seven million, seven hundred eighty-five thousand, twenty-three".