971491 has 2 divisors, whose sum is σ = 971492. Its totient is φ = 971490.

The previous prime is 971483. The next prime is 971501. The reversal of 971491 is 194179.

It is a weak prime.

It is an emirp because it is prime and its reverse (194179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971491 - 2³ = 971483 is a prime.

It is equal to p₇₆₄₆₈ and since 971491 and 76468 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (971401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485745 + 485746.

It is an arithmetic number, because the mean of its divisors is an integer number (485746).

2⁹⁷¹⁴⁹¹ is an apocalyptic number.

971491 is a deficient number, since it is larger than the sum of its proper divisors (1).

971491 is an equidigital number, since it uses as much as digits as its factorization.

971491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 31.

The square root of 971491 is about 985.6424300932. The cubic root of 971491 is about 99.0405234913.

The spelling of 971491 in words is "nine hundred seventy-one thousand, four hundred ninety-one".