87997911 has 8 divisors (see below), whose sum is σ = 123505920. Its totient is φ = 55577592.

The previous prime is 87997901. The next prime is 87997913. The reversal of 87997911 is 11979978.

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

It is not a de Polignac number, because 87997911 - 2¹³ = 87989719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87997913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771855 + ... + 771968.

It is an arithmetic number, because the mean of its divisors is an integer number (15438240).

Almost surely, 2^87997911 is an apocalyptic number.

87997911 is a deficient number, since it is larger than the sum of its proper divisors (35508009).

87997911 is a wasteful number, since it uses less digits than its factorization.

87997911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543845.

The product of its digits is 285768, while the sum is 51.

The square root of 87997911 is about 9380.7201749119. The cubic root of 87997911 is about 444.7924984690.

It can be divided in two parts, 879979 and 11, that multiplied together give a palindrome (9679769).

The spelling of 87997911 in words is "eighty-seven million, nine hundred ninety-seven thousand, nine hundred eleven".