971869 has 4 divisors (see below), whose sum is σ = 1023040. Its totient is φ = 920700.

The previous prime is 971863. The next prime is 971899. The reversal of 971869 is 968179.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 971869 - 2⁹ = 971357 is a prime.

It is a super-2 number, since 2×971869² = 1889058706322, 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 (971863) 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, 25557 + ... + 25594.

It is an arithmetic number, because the mean of its divisors is an integer number (255760).

2⁹⁷¹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

971869 is a deficient number, since it is larger than the sum of its proper divisors (51171).

971869 is a wasteful number, since it uses less digits than its factorization.

971869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51170.

The product of its digits is 27216, while the sum is 40.

The square root of 971869 is about 985.8341645530. The cubic root of 971869 is about 99.0533671386.

The spelling of 971869 in words is "nine hundred seventy-one thousand, eight hundred sixty-nine".