1997623330 has 16 divisors (see below), whose sum is σ = 3784970880. Its totient is φ = 756994032.

The previous prime is 1997623307. The next prime is 1997623337. The reversal of 1997623330 is 333267991.

It is not an unprimeable number, because it can be changed into a prime (1997623337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5256714 + ... + 5257093.

It is an arithmetic number, because the mean of its divisors is an integer number (236560680).

Almost surely, 2^1997623330 is an apocalyptic number.

1997623330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997623330 is a deficient number, since it is larger than the sum of its proper divisors (1787347550).

1997623330 is a wasteful number, since it uses less digits than its factorization.

1997623330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10513833.

The product of its (nonzero) digits is 183708, while the sum is 43.

The square root of 1997623330 is about 44694.7796727985. The cubic root of 1997623330 is about 1259.4217826501.

The spelling of 1997623330 in words is "one billion, nine hundred ninety-seven million, six hundred twenty-three thousand, three hundred thirty".