1997054370 has 24 divisors (see below), whose sum is σ = 5192341596. Its totient is φ = 532547808.

The previous prime is 1997054369. The next prime is 1997054377. The reversal of 1997054370 is 734507991.

1997054370 is a `hidden beast` number, since 19 + 97 + 0 + 543 + 7 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1915025121 + 82029249 = 43761^2 + 9057^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1997054377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11094657 + ... + 11094836.

Almost surely, 2^1997054370 is an apocalyptic number.

1997054370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997054370 is an abundant number, since it is smaller than the sum of its proper divisors (3195287226).

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

1997054370 is a wasteful number, since it uses less digits than its factorization.

1997054370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22189506 (or 22189503 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 1997054370 is about 44688.4142703677. The cubic root of 1997054370 is about 1259.3022024391.

The spelling of 1997054370 in words is "one billion, nine hundred ninety-seven million, fifty-four thousand, three hundred seventy".