87421311 has 12 divisors (see below), whose sum is σ = 126918792. Its totient is φ = 57983856.

The previous prime is 87421291. The next prime is 87421319. The reversal of 87421311 is 11312478.

It is not a de Polignac number, because 87421311 - 2¹⁰ = 87420287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87421319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22881 + ... + 26426.

It is an arithmetic number, because the mean of its divisors is an integer number (10576566).

Almost surely, 2^87421311 is an apocalyptic number.

87421311 is a deficient number, since it is larger than the sum of its proper divisors (39497481).

87421311 is a wasteful number, since it uses less digits than its factorization.

87421311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49510 (or 49507 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 87421311 is about 9349.9364168961. The cubic root of 87421311 is about 443.8188785233.

Adding to 87421311 its reverse (11312478), we get a palindrome (98733789).

The spelling of 87421311 in words is "eighty-seven million, four hundred twenty-one thousand, three hundred eleven".