87213263 has 8 divisors (see below), whose sum is σ = 91441536. Its totient is φ = 83021400.

The previous prime is 87213253. The next prime is 87213277. The reversal of 87213263 is 36231278.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87213263 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 (87213223) 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, 4133 + ... + 13838.

It is an arithmetic number, because the mean of its divisors is an integer number (11430192).

Almost surely, 2^87213263 is an apocalyptic number.

87213263 is a deficient number, since it is larger than the sum of its proper divisors (4228273).

87213263 is a wasteful number, since it uses less digits than its factorization.

87213263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18205.

The product of its digits is 12096, while the sum is 32.

The square root of 87213263 is about 9338.8041525669. The cubic root of 87213263 is about 443.4665274633.

The spelling of 87213263 in words is "eighty-seven million, two hundred thirteen thousand, two hundred sixty-three".