971899 has 2 divisors, whose sum is σ = 971900. Its totient is φ = 971898.

The previous prime is 971863. The next prime is 971903. The reversal of 971899 is 998179.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 971899 - 2⁹ = 971387 is a prime.

It is not a weakly prime, because it can be changed into another prime (971099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485949 + 485950.

It is an arithmetic number, because the mean of its divisors is an integer number (485950).

2⁹⁷¹⁸⁹⁹ is an apocalyptic number.

971899 is a deficient number, since it is larger than the sum of its proper divisors (1).

971899 is an equidigital number, since it uses as much as digits as its factorization.

971899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 43.

The square root of 971899 is about 985.8493799765. The cubic root of 971899 is about 99.0543863331.

The spelling of 971899 in words is "nine hundred seventy-one thousand, eight hundred ninety-nine".