1971707 has 2 divisors, whose sum is σ = 1971708. Its totient is φ = 1971706.

The previous prime is 1971691. The next prime is 1971709. The reversal of 1971707 is 7071791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1971707 - 2⁴ = 1971691 is a prime.

Together with 1971709, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1971709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985853 + 985854.

It is an arithmetic number, because the mean of its divisors is an integer number (985854).

2^1971707 is an apocalyptic number.

1971707 is a deficient number, since it is larger than the sum of its proper divisors (1).

1971707 is an equidigital number, since it uses as much as digits as its factorization.

1971707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3087, while the sum is 32.

The square root of 1971707 is about 1404.1748466626. The cubic root of 1971707 is about 125.3951654378.

The spelling of 1971707 in words is "one million, nine hundred seventy-one thousand, seven hundred seven".