1997734 has 16 divisors (see below), whose sum is σ = 3159648. Its totient is φ = 945472.

The previous prime is 1997731. The next prime is 1997747. The reversal of 1997734 is 4377991.

It is a super-2 number, since 2×1997734² = 7981882269512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997731) 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, 6144 + ... + 6460.

It is an arithmetic number, because the mean of its divisors is an integer number (197478).

2^1997734 is an apocalyptic number.

1997734 is a deficient number, since it is larger than the sum of its proper divisors (1161914).

1997734 is a wasteful number, since it uses less digits than its factorization.

1997734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its digits is 47628, while the sum is 40.

The square root of 1997734 is about 1413.4121833351. The cubic root of 1997734 is about 125.9445039893.

The spelling of 1997734 in words is "one million, nine hundred ninety-seven thousand, seven hundred thirty-four".