1997370 has 24 divisors (see below), whose sum is σ = 5193396. Its totient is φ = 532608.

The previous prime is 1997351. The next prime is 1997407. The reversal of 1997370 is 737991.

It can be written as a sum of positive squares in 2 ways, for example, as 1912689 + 84681 = 1383^2 + 291^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11007 + ... + 11186.

2^1997370 is an apocalyptic number.

1997370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997370 is an abundant number, since it is smaller than the sum of its proper divisors (3196026).

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

1997370 is a wasteful number, since it uses less digits than its factorization.

1997370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22206 (or 22203 counting only the distinct ones).

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

The square root of 1997370 is about 1413.2834110680. The cubic root of 1997370 is about 125.9368542248.

It can be divided in two parts, 199 and 7370, that added together give a square (7569 = 87²).

The spelling of 1997370 in words is "one million, nine hundred ninety-seven thousand, three hundred seventy".