1997079192 has 64 divisors (see below), whose sum is σ = 5576601600. Its totient is φ = 662194080.

The previous prime is 1997079109. The next prime is 1997079223. The reversal of 1997079192 is 2919707991.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17053 + ... + 65459.

It is an arithmetic number, because the mean of its divisors is an integer number (87134400).

Almost surely, 2^1997079192 is an apocalyptic number.

1997079192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997079192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2788300800).

1997079192 is an abundant number, since it is smaller than the sum of its proper divisors (3579522408).

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

1997079192 is a wasteful number, since it uses less digits than its factorization.

1997079192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48613 (or 48603 counting only the distinct ones).

The product of its (nonzero) digits is 642978, while the sum is 54.

The square root of 1997079192 is about 44688.6919924940. The cubic root of 1997079192 is about 1259.3074198349.

The spelling of 1997079192 in words is "one billion, nine hundred ninety-seven million, seventy-nine thousand, one hundred ninety-two".