1997335545 has 16 divisors (see below), whose sum is σ = 3209820480. Its totient is φ = 1060551104.

The previous prime is 1997335519. The next prime is 1997335567. The reversal of 1997335545 is 5455337991.

It is a cyclic number.

It is not a de Polignac number, because 1997335545 - 2⁵ = 1997335513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289890 + ... + 296699.

It is an arithmetic number, because the mean of its divisors is an integer number (200613780).

Almost surely, 2^1997335545 is an apocalyptic number.

1997335545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1997335545 is a deficient number, since it is larger than the sum of its proper divisors (1212484935).

1997335545 is a wasteful number, since it uses less digits than its factorization.

1997335545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586824.

The product of its digits is 2551500, while the sum is 51.

The square root of 1997335545 is about 44691.5601092645. The cubic root of 1997335545 is about 1259.3613007600.

The spelling of 1997335545 in words is "one billion, nine hundred ninety-seven million, three hundred thirty-five thousand, five hundred forty-five".