1997316 has 36 divisors (see below), whose sum is σ = 5105100. Its totient is φ = 658368.

The previous prime is 1997311. The next prime is 1997321. The reversal of 1997316 is 6137991.

It is an interprime number because it is at equal distance from previous prime (1997311) and next prime (1997321).

It can be written as a sum of positive squares in 2 ways, for example, as 1512900 + 484416 = 1230^2 + 696^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1997311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3670 + ... + 4178.

2^1997316 is an apocalyptic number.

It is an amenable number.

1997316 is an abundant number, since it is smaller than the sum of its proper divisors (3107784).

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

1997316 is a wasteful number, since it uses less digits than its factorization.

1997316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 623 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1997316 is about 1413.2643064905. The cubic root of 1997316 is about 125.9357192905.

The spelling of 1997316 in words is "one million, nine hundred ninety-seven thousand, three hundred sixteen".