971139 has 16 divisors (see below), whose sum is σ = 1434272. Its totient is φ = 580608.

The previous prime is 971111. The next prime is 971141. The reversal of 971139 is 931179.

971139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 971139 - 2⁸ = 970883 is a prime.

It is a super-2 number, since 2×971139² = 1886221914642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107 + ... + 1779.

It is an arithmetic number, because the mean of its divisors is an integer number (89642).

2⁹⁷¹¹³⁹ is an apocalyptic number.

971139 is a deficient number, since it is larger than the sum of its proper divisors (463133).

971139 is a wasteful number, since it uses less digits than its factorization.

971139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 1701, while the sum is 30.

The square root of 971139 is about 985.4638501741. The cubic root of 971139 is about 99.0285602733.

The spelling of 971139 in words is "nine hundred seventy-one thousand, one hundred thirty-nine".