87212193 has 16 divisors (see below), whose sum is σ = 127370880. Its totient is φ = 52833536.

The previous prime is 87212183. The next prime is 87212197. The reversal of 87212193 is 39121278.

It is a cyclic number.

It is not a de Polignac number, because 87212193 - 2⁵ = 87212161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87212197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28005 + ... + 30962.

It is an arithmetic number, because the mean of its divisors is an integer number (7960680).

Almost surely, 2^87212193 is an apocalyptic number.

It is an amenable number.

87212193 is a deficient number, since it is larger than the sum of its proper divisors (40158687).

87212193 is a wasteful number, since it uses less digits than its factorization.

87212193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59016.

The product of its digits is 6048, while the sum is 33.

The square root of 87212193 is about 9338.7468645424. The cubic root of 87212193 is about 443.4647138587.

The spelling of 87212193 in words is "eighty-seven million, two hundred twelve thousand, one hundred ninety-three".