8270139 has 4 divisors (see below), whose sum is σ = 11026856. Its totient is φ = 5513424.

The previous prime is 8270077. The next prime is 8270153. The reversal of 8270139 is 9310728.

It is a happy number.

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

It is not a de Polignac number, because 8270139 - 2¹² = 8266043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8270039) 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, 1378354 + ... + 1378359.

It is an arithmetic number, because the mean of its divisors is an integer number (2756714).

Almost surely, 2^8270139 is an apocalyptic number.

8270139 is a deficient number, since it is larger than the sum of its proper divisors (2756717).

8270139 is a wasteful number, since it uses less digits than its factorization.

8270139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756716.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 8270139 is about 2875.7849363261. The cubic root of 8270139 is about 202.2262846644.

The spelling of 8270139 in words is "eight million, two hundred seventy thousand, one hundred thirty-nine".