1997662692 has 24 divisors (see below), whose sum is σ = 4811575552. Its totient is φ = 644407200.

The previous prime is 1997662663. The next prime is 1997662699. The reversal of 1997662692 is 2962667991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1997662699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2684659 + ... + 2685402.

Almost surely, 2^1997662692 is an apocalyptic number.

1997662692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1997662692 is an abundant number, since it is smaller than the sum of its proper divisors (2813912860).

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

1997662692 is a wasteful number, since it uses less digits than its factorization.

1997662692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370099 (or 5370097 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 57.

The square root of 1997662692 is about 44695.2200128828. The cubic root of 1997662692 is about 1259.4300546524.

The spelling of 1997662692 in words is "one billion, nine hundred ninety-seven million, six hundred sixty-two thousand, six hundred ninety-two".