971409 has 4 divisors (see below), whose sum is σ = 1295216. Its totient is φ = 647604.

The previous prime is 971401. The next prime is 971419. The reversal of 971409 is 904179.

971409 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 971409 - 2³ = 971401 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971401) 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, 161899 + ... + 161904.

It is an arithmetic number, because the mean of its divisors is an integer number (323804).

2⁹⁷¹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

971409 is a deficient number, since it is larger than the sum of its proper divisors (323807).

971409 is a wasteful number, since it uses less digits than its factorization.

971409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323806.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 971409 is about 985.6008319802. The cubic root of 971409 is about 99.0377368635.

The spelling of 971409 in words is "nine hundred seventy-one thousand, four hundred nine".