1320172997 has 8 divisors (see below), whose sum is σ = 1550972640. Its totient is φ = 1107837360.

The previous prime is 1320172937. The next prime is 1320172999. The reversal of 1320172997 is 7992710231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320172997 - 2¹⁰ = 1320171973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320172999) 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, 4615847 + ... + 4616132.

It is an arithmetic number, because the mean of its divisors is an integer number (193871580).

Almost surely, 2^1320172997 is an apocalyptic number.

It is an amenable number.

1320172997 is a deficient number, since it is larger than the sum of its proper divisors (230799643).

1320172997 is a wasteful number, since it uses less digits than its factorization.

1320172997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9232003.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 1320172997 is about 36334.1849640253. The cubic root of 1320172997 is about 1097.0092303668.

The spelling of 1320172997 in words is "one billion, three hundred twenty million, one hundred seventy-two thousand, nine hundred ninety-seven".