971939 has 2 divisors, whose sum is σ = 971940. Its totient is φ = 971938.

The previous prime is 971933. The next prime is 971951. The reversal of 971939 is 939179.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (939179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971939 - 2⁸ = 971683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (971933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485969 + 485970.

It is an arithmetic number, because the mean of its divisors is an integer number (485970).

2⁹⁷¹⁹³⁹ is an apocalyptic number.

971939 is a deficient number, since it is larger than the sum of its proper divisors (1).

971939 is an equidigital number, since it uses as much as digits as its factorization.

971939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15309, while the sum is 38.

The square root of 971939 is about 985.8696668424. The cubic root of 971939 is about 99.0557452263.

The spelling of 971939 in words is "nine hundred seventy-one thousand, nine hundred thirty-nine".