102861787 has 4 divisors (see below), whose sum is σ = 117556336. Its totient is φ = 88167240.

The previous prime is 102861779. The next prime is 102861791. The reversal of 102861787 is 787168201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102861787 - 2³ = 102861779 is a prime.

It is a super-3 number, since 3×102861787³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102861797) 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, 7347264 + ... + 7347277.

It is an arithmetic number, because the mean of its divisors is an integer number (29389084).

Almost surely, 2^102861787 is an apocalyptic number.

102861787 is a deficient number, since it is larger than the sum of its proper divisors (14694549).

102861787 is an equidigital number, since it uses as much as digits as its factorization.

102861787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14694548.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 102861787 is about 10142.0800134884. The cubic root of 102861787 is about 468.5450509791.

The spelling of 102861787 in words is "one hundred two million, eight hundred sixty-one thousand, seven hundred eighty-seven".