87749811 has 20 divisors (see below), whose sum is σ = 132256872. Its totient is φ = 57976128.

The previous prime is 87749777. The next prime is 87749813. The reversal of 87749811 is 11894778.

It is not a de Polignac number, because 87749811 - 2¹⁵ = 87717043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87749813) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4360 + ... + 13946.

Almost surely, 2^87749811 is an apocalyptic number.

87749811 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

87749811 is a deficient number, since it is larger than the sum of its proper divisors (44507061).

87749811 is a wasteful number, since it uses less digits than its factorization.

87749811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712 (or 9703 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 87749811 is about 9367.4869095185. The cubic root of 87749811 is about 444.3740912228.

The spelling of 87749811 in words is "eighty-seven million, seven hundred forty-nine thousand, eight hundred eleven".