1375171997 has 8 divisors (see below), whose sum is σ = 1419962112. Its totient is φ = 1330408800.

The previous prime is 1375171969. The next prime is 1375171999. The reversal of 1375171997 is 7991715731.

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 1375171997 - 2⁸ = 1375171741 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 (1375171999) 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, 178097 + ... + 185657.

It is an arithmetic number, because the mean of its divisors is an integer number (177495264).

Almost surely, 2^1375171997 is an apocalyptic number.

It is an amenable number.

1375171997 is a deficient number, since it is larger than the sum of its proper divisors (44790115).

1375171997 is an equidigital number, since it uses as much as digits as its factorization.

1375171997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13459.

The product of its digits is 416745, while the sum is 50.

The square root of 1375171997 is about 37083.3115700311. The cubic root of 1375171997 is about 1112.0364091580.

The spelling of 1375171997 in words is "one billion, three hundred seventy-five million, one hundred seventy-one thousand, nine hundred ninety-seven".