8102870139 has 32 divisors (see below), whose sum is σ = 13621353984. Its totient is φ = 4169790720.

The previous prime is 8102870099. The next prime is 8102870141. The reversal of 8102870139 is 9310782018.

It is not a de Polignac number, because 8102870139 - 2⁸ = 8102869883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 8102870097 and 8102870106.

It is not an unprimeable number, because it can be changed into a prime (8102870159) 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, 350769 + ... + 373154.

It is an arithmetic number, because the mean of its divisors is an integer number (425667312).

Almost surely, 2^8102870139 is an apocalyptic number.

8102870139 is a deficient number, since it is larger than the sum of its proper divisors (5518483845).

8102870139 is a wasteful number, since it uses less digits than its factorization.

8102870139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723987.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 8102870139 is about 90015.9438044172. The cubic root of 8102870139 is about 2008.5360278669.

The spelling of 8102870139 in words is "eight billion, one hundred two million, eight hundred seventy thousand, one hundred thirty-nine".