1997704 has 32 divisors (see below), whose sum is σ = 4083480. Its totient is φ = 912384.

The previous prime is 1997701. The next prime is 1997707. The reversal of 1997704 is 4077991.

It is an interprime number because it is at equal distance from previous prime (1997701) and next prime (1997707).

It can be written as a sum of positive squares in 4 ways, for example, as 1988100 + 9604 = 1410^2 + 98^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (1997701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4834 + ... + 5230.

2^1997704 is an apocalyptic number.

It is an amenable number.

1997704 is an abundant number, since it is smaller than the sum of its proper divisors (2085776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997704 is a wasteful number, since it uses less digits than its factorization.

1997704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 1997704 is about 1413.4015706798. The cubic root of 1997704 is about 125.9438735494.

It can be divided in two parts, 1997 and 704, that added together give a triangular number (2701 = T₇₃).

The spelling of 1997704 in words is "one million, nine hundred ninety-seven thousand, seven hundred four".