1002771139 has 4 divisors (see below), whose sum is σ = 1019767320. Its totient is φ = 985774960.

The previous prime is 1002771103. The next prime is 1002771157. The reversal of 1002771139 is 9311772001.

1002771139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9311772001 = 7 ⋅1330253143.

It is a cyclic number.

It is not a de Polignac number, because 1002771139 - 2²¹ = 1000673987 is a prime.

It is a super-2 number, since 2×1002771139² = 2011099914422714642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1002771139.

It is not an unprimeable number, because it can be changed into a prime (1002771169) 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, 8498002 + ... + 8498119.

It is an arithmetic number, because the mean of its divisors is an integer number (254941830).

Almost surely, 2^1002771139 is an apocalyptic number.

1002771139 is a deficient number, since it is larger than the sum of its proper divisors (16996181).

1002771139 is an equidigital number, since it uses as much as digits as its factorization.

1002771139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16996180.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 1002771139 is about 31666.5618436862. The cubic root of 1002771139 is about 1000.9228610655.

The spelling of 1002771139 in words is "one billion, two million, seven hundred seventy-one thousand, one hundred thirty-nine".