87786213 has 8 divisors (see below), whose sum is σ = 123208800. Its totient is φ = 55443888.

The previous prime is 87786211. The next prime is 87786217. The reversal of 87786213 is 31268778.

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

It is not a de Polignac number, because 87786213 - 2¹ = 87786211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87786211) 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, 769998 + ... + 770111.

It is an arithmetic number, because the mean of its divisors is an integer number (15401100).

Almost surely, 2^87786213 is an apocalyptic number.

It is an amenable number.

87786213 is a deficient number, since it is larger than the sum of its proper divisors (35422587).

87786213 is a wasteful number, since it uses less digits than its factorization.

87786213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540131.

The product of its digits is 112896, while the sum is 42.

The square root of 87786213 is about 9369.4297051635. The cubic root of 87786213 is about 444.4355305550.

The spelling of 87786213 in words is "eighty-seven million, seven hundred eighty-six thousand, two hundred thirteen".