1997196100 has 81 divisors (see below), whose sum is σ = 4483326981. Its totient is φ = 772243200.

The previous prime is 1997196073. The next prime is 1997196107. The reversal of 1997196100 is 16917991.

It is a happy number.

The square root of 1997196100 is 44690.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 1842641476 + 154554624 = 42926^2 + 12432^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997196107) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18322846 + ... + 18322954.

Almost surely, 2^1997196100 is an apocalyptic number.

1997196100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997196100 is the 44690-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997196100

1997196100 is an abundant number, since it is smaller than the sum of its proper divisors (2486130881).

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

1997196100 is a wasteful number, since it uses less digits than its factorization.

1997196100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 43.

The cubic root of 1997196100 is about 1259.3319924274.

The spelling of 1997196100 in words is "one billion, nine hundred ninety-seven million, one hundred ninety-six thousand, one hundred".