1997383086 has 24 divisors (see below), whose sum is σ = 4332598920. Its totient is φ = 665035056.

The previous prime is 1997383079. The next prime is 1997383097. The reversal of 1997383086 is 6803837991.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46941 + ... + 78728.

It is an arithmetic number, because the mean of its divisors is an integer number (180524955).

Almost surely, 2^1997383086 is an apocalyptic number.

1997383086 is an abundant number, since it is smaller than the sum of its proper divisors (2335215834).

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

1997383086 is a wasteful number, since it uses less digits than its factorization.

1997383086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126560 (or 126557 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 1997383086 is about 44692.0919850481. The cubic root of 1997383086 is about 1259.3712925414.

The spelling of 1997383086 in words is "one billion, nine hundred ninety-seven million, three hundred eighty-three thousand, eighty-six".