1971339 has 4 divisors (see below), whose sum is σ = 2628456. Its totient is φ = 1314224.

The previous prime is 1971329. The next prime is 1971349. The reversal of 1971339 is 9331791.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1971329) and next prime (1971349).

It is a cyclic number.

It is not a de Polignac number, because 1971339 - 2¹¹ = 1969291 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1971329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328554 + ... + 328559.

It is an arithmetic number, because the mean of its divisors is an integer number (657114).

2^1971339 is an apocalyptic number.

1971339 is a deficient number, since it is larger than the sum of its proper divisors (657117).

1971339 is an equidigital number, since it uses as much as digits as its factorization.

1971339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657116.

The product of its digits is 5103, while the sum is 33.

The square root of 1971339 is about 1404.0438027355. The cubic root of 1971339 is about 125.3873636883.

The spelling of 1971339 in words is "one million, nine hundred seventy-one thousand, three hundred thirty-nine".