1997029514409 has 16 divisors (see below), whose sum is σ = 2819501669952. Its totient is φ = 1252964400128.

The previous prime is 1997029514401. The next prime is 1997029514437. The reversal of 1997029514409 is 9044159207991.

It is a cyclic number.

It is not a de Polignac number, because 1997029514409 - 2³ = 1997029514401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997029514401) 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, 270144 + ... + 2016689.

It is an arithmetic number, because the mean of its divisors is an integer number (176218854372).

Almost surely, 2^{1997029514409} is an apocalyptic number.

It is an amenable number.

1997029514409 is a deficient number, since it is larger than the sum of its proper divisors (822472155543).

1997029514409 is a wasteful number, since it uses less digits than its factorization.

1997029514409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303976.

The product of its (nonzero) digits is 7348320, while the sum is 60.

The spelling of 1997029514409 in words is "one trillion, nine hundred ninety-seven billion, twenty-nine million, five hundred fourteen thousand, four hundred nine".