87761811 has 16 divisors (see below), whose sum is σ = 118937600. Its totient is φ = 57552768.

The previous prime is 87761809. The next prime is 87761819. The reversal of 87761811 is 11816778.

It is not a de Polignac number, because 87761811 - 2¹ = 87761809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87761811.

It is not an unprimeable number, because it can be changed into a prime (87761819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86475 + ... + 87483.

It is an arithmetic number, because the mean of its divisors is an integer number (7433600).

Almost surely, 2^87761811 is an apocalyptic number.

87761811 is a deficient number, since it is larger than the sum of its proper divisors (31175789).

87761811 is a wasteful number, since it uses less digits than its factorization.

87761811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458.

The product of its digits is 18816, while the sum is 39.

The square root of 87761811 is about 9368.1274009270. The cubic root of 87761811 is about 444.3943467120.

The spelling of 87761811 in words is "eighty-seven million, seven hundred sixty-one thousand, eight hundred eleven".