87212183 has 2 divisors, whose sum is σ = 87212184. Its totient is φ = 87212182.

The previous prime is 87212161. The next prime is 87212197. The reversal of 87212183 is 38121278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87212183 - 2²⁶ = 20103319 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87212143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43606091 + 43606092.

It is an arithmetic number, because the mean of its divisors is an integer number (43606092).

Almost surely, 2^87212183 is an apocalyptic number.

87212183 is a deficient number, since it is larger than the sum of its proper divisors (1).

87212183 is an equidigital number, since it uses as much as digits as its factorization.

87212183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 87212183 is about 9338.7463291386. The cubic root of 87212183 is about 443.4646969091.

The spelling of 87212183 in words is "eighty-seven million, two hundred twelve thousand, one hundred eighty-three".