98787811 has 4 divisors (see below), whose sum is σ = 98807752. Its totient is φ = 98767872.

The previous prime is 98787803. The next prime is 98787847. The reversal of 98787811 is 11878789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11878789 = 13 ⋅913753.

It is a cyclic number.

It is not a de Polignac number, because 98787811 - 2³ = 98787803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98781811) 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, 3811 + ... + 14563.

It is an arithmetic number, because the mean of its divisors is an integer number (24701938).

Almost surely, 2^98787811 is an apocalyptic number.

98787811 is a deficient number, since it is larger than the sum of its proper divisors (19941).

98787811 is a wasteful number, since it uses less digits than its factorization.

98787811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19940.

The product of its digits is 225792, while the sum is 49.

The square root of 98787811 is about 9939.2057529764. The cubic root of 98787811 is about 462.2757594234.

It can be divided in two parts, 9878 and 7811, that added together give a square (17689 = 133²).

The spelling of 98787811 in words is "ninety-eight million, seven hundred eighty-seven thousand, eight hundred eleven".