971400491 has 2 divisors, whose sum is σ = 971400492. Its totient is φ = 971400490.

The previous prime is 971400473. The next prime is 971400569. The reversal of 971400491 is 194004179.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 971400491 - 2¹⁴ = 971384107 is a prime.

It is not a weakly prime, because it can be changed into another prime (971400431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485700245 + 485700246.

It is an arithmetic number, because the mean of its divisors is an integer number (485700246).

Almost surely, 2^971400491 is an apocalyptic number.

971400491 is a deficient number, since it is larger than the sum of its proper divisors (1).

971400491 is an equidigital number, since it uses as much as digits as its factorization.

971400491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 971400491 is about 31167.2984231871. The cubic root of 971400491 is about 990.3744769090.

The spelling of 971400491 in words is "nine hundred seventy-one million, four hundred thousand, four hundred ninety-one".