997662 has 16 divisors (see below), whose sum is σ = 2112912. Its totient is φ = 312960.

The previous prime is 997651. The next prime is 997663. The reversal of 997662 is 266799.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 997662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997663) by changing a digit.

997662 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4789 + ... + 4992.

It is an arithmetic number, because the mean of its divisors is an integer number (132057).

2⁹⁹⁷⁶⁶² is an apocalyptic number.

997662 is an abundant number, since it is smaller than the sum of its proper divisors (1115250).

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

997662 is a wasteful number, since it uses less digits than its factorization.

997662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9803.

The product of its digits is 40824, while the sum is 39.

The square root of 997662 is about 998.8303159196. The cubic root of 997662 is about 99.9220058516.

The spelling of 997662 in words is "nine hundred ninety-seven thousand, six hundred sixty-two".