1997432223 has 16 divisors (see below), whose sum is σ = 2690012160. Its totient is φ = 1318302944.

The previous prime is 1997432201. The next prime is 1997432243. The reversal of 1997432223 is 3222347991.

It is a cyclic number.

It is not a de Polignac number, because 1997432223 - 2⁸ = 1997431967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997432243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115990 + ... + 132092.

It is an arithmetic number, because the mean of its divisors is an integer number (168125760).

Almost surely, 2^1997432223 is an apocalyptic number.

1997432223 is a deficient number, since it is larger than the sum of its proper divisors (692579937).

1997432223 is a wasteful number, since it uses less digits than its factorization.

1997432223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16518.

The product of its digits is 163296, while the sum is 42.

The square root of 1997432223 is about 44692.6417097938. The cubic root of 1997432223 is about 1259.3816195906.

The spelling of 1997432223 in words is "one billion, nine hundred ninety-seven million, four hundred thirty-two thousand, two hundred twenty-three".