1375198397 has 4 divisors (see below), whose sum is σ = 1447577280. Its totient is φ = 1302819516.

The previous prime is 1375198381. The next prime is 1375198399. The reversal of 1375198397 is 7938915731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1375198397 - 2⁴ = 1375198381 is a prime.

It is a super-2 number, since 2×1375198397² = 3782341262222739218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375198399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36189413 + ... + 36189450.

It is an arithmetic number, because the mean of its divisors is an integer number (361894320).

Almost surely, 2^1375198397 is an apocalyptic number.

It is an amenable number.

1375198397 is a deficient number, since it is larger than the sum of its proper divisors (72378883).

1375198397 is an equidigital number, since it uses as much as digits as its factorization.

1375198397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72378882.

The product of its digits is 1428840, while the sum is 53.

The square root of 1375198397 is about 37083.6675235878. The cubic root of 1375198397 is about 1112.0435252553.

The spelling of 1375198397 in words is "one billion, three hundred seventy-five million, one hundred ninety-eight thousand, three hundred ninety-seven".