102820887 has 32 divisors (see below), whose sum is σ = 164660160. Its totient is φ = 63037440.

The previous prime is 102820859. The next prime is 102820897. The reversal of 102820887 is 788028201.

It is not a de Polignac number, because 102820887 - 2¹⁰ = 102819863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102820897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160087 + ... + 160727.

It is an arithmetic number, because the mean of its divisors is an integer number (5145630).

Almost surely, 2^102820887 is an apocalyptic number.

102820887 is a deficient number, since it is larger than the sum of its proper divisors (61839273).

102820887 is a wasteful number, since it uses less digits than its factorization.

102820887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 102820887 is about 10140.0634613399. The cubic root of 102820887 is about 468.4829416392.

The spelling of 102820887 in words is "one hundred two million, eight hundred twenty thousand, eight hundred eighty-seven".