971397 has 24 divisors (see below), whose sum is σ = 1699776. Its totient is φ = 521856.

The previous prime is 971389. The next prime is 971401. The reversal of 971397 is 793179.

971397 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 971397 - 2³ = 971389 is a prime.

It is a super-2 number, since 2×971397² = 1887224263218, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

971397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618 + ... + 1524.

It is an arithmetic number, because the mean of its divisors is an integer number (70824).

2⁹⁷¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

971397 is a deficient number, since it is larger than the sum of its proper divisors (728379).

971397 is a wasteful number, since it uses less digits than its factorization.

971397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 934 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 971397 is about 985.5947443042. The cubic root of 971397 is about 99.0373290511.

The spelling of 971397 in words is "nine hundred seventy-one thousand, three hundred ninety-seven".