1997707 has 2 divisors, whose sum is σ = 1997708. Its totient is φ = 1997706.

The previous prime is 1997701. The next prime is 1997713. The reversal of 1997707 is 7077991.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1997701) and next prime (1997713).

It is a cyclic number.

It is not a de Polignac number, because 1997707 - 2¹⁹ = 1473419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1997707.

It is not a weakly prime, because it can be changed into another prime (1997701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998853 + 998854.

It is an arithmetic number, because the mean of its divisors is an integer number (998854).

2^1997707 is an apocalyptic number.

1997707 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997707 is an equidigital number, since it uses as much as digits as its factorization.

1997707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 1997707 is about 1413.4026319489. The cubic root of 1997707 is about 125.9439365936.

It can be divided in two parts, 1997 and 707, that added together give a square (2704 = 52²).

The spelling of 1997707 in words is "one million, nine hundred ninety-seven thousand, seven hundred seven".