1997147166 has 32 divisors (see below), whose sum is σ = 4651043328. Its totient is φ = 559846560.

The previous prime is 1997147153. The next prime is 1997147167. The reversal of 1997147166 is 6617417991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997147167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446370 + ... + 450821.

It is an arithmetic number, because the mean of its divisors is an integer number (145345104).

Almost surely, 2^1997147166 is an apocalyptic number.

1997147166 is an abundant number, since it is smaller than the sum of its proper divisors (2653896162).

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

1997147166 is a wasteful number, since it uses less digits than its factorization.

1997147166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897256.

The product of its digits is 571536, while the sum is 51.

The square root of 1997147166 is about 44689.4525139881. The cubic root of 1997147166 is about 1259.3217072322.

The spelling of 1997147166 in words is "one billion, nine hundred ninety-seven million, one hundred forty-seven thousand, one hundred sixty-six".