87211277 has 4 divisors (see below), whose sum is σ = 90024576. Its totient is φ = 84397980.

The previous prime is 87211249. The next prime is 87211279. The reversal of 87211277 is 77211278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87211277 - 2⁶ = 87211213 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 (87211279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406603 + ... + 1406664.

It is an arithmetic number, because the mean of its divisors is an integer number (22506144).

Almost surely, 2^87211277 is an apocalyptic number.

It is an amenable number.

87211277 is a deficient number, since it is larger than the sum of its proper divisors (2813299).

87211277 is a wasteful number, since it uses less digits than its factorization.

87211277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813298.

The product of its digits is 10976, while the sum is 35.

The square root of 87211277 is about 9338.6978214310. The cubic root of 87211277 is about 443.4631612658.

Subtracting from 87211277 its reverse (77211278), we obtain a palindrome (9999999).

The spelling of 87211277 in words is "eighty-seven million, two hundred eleven thousand, two hundred seventy-seven".