1997307 has 24 divisors (see below), whose sum is σ = 3187184. Its totient is φ = 1197504.

The previous prime is 1997293. The next prime is 1997311. The reversal of 1997307 is 7037991.

It is not a de Polignac number, because 1997307 - 2⁶ = 1997243 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1997407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4833 + ... + 5229.

2^1997307 is an apocalyptic number.

1997307 is a deficient number, since it is larger than the sum of its proper divisors (1189877).

1997307 is a wasteful number, since it uses less digits than its factorization.

1997307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 1997307 is about 1413.2611223691. The cubic root of 1997307 is about 125.9355301327.

It can be divided in two parts, 1997 and 307, that added together give a square (2304 = 48²).

The spelling of 1997307 in words is "one million, nine hundred ninety-seven thousand, three hundred seven".