1376171993 has 4 divisors (see below), whose sum is σ = 1572768000. Its totient is φ = 1179575988.

The previous prime is 1376171941. The next prime is 1376172013. The reversal of 1376171993 is 3991716731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3991716731 = 12713 ⋅313987.

It is a cyclic number.

It is not a de Polignac number, because 1376171993 - 2²² = 1371977689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1376170993) 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, 98297993 + ... + 98298006.

It is an arithmetic number, because the mean of its divisors is an integer number (393192000).

Almost surely, 2^1376171993 is an apocalyptic number.

It is an amenable number.

1376171993 is a deficient number, since it is larger than the sum of its proper divisors (196596007).

1376171993 is an equidigital number, since it uses as much as digits as its factorization.

1376171993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196596006.

The product of its digits is 214326, while the sum is 47.

The square root of 1376171993 is about 37096.7922198133. The cubic root of 1376171993 is about 1112.3058936355.

The spelling of 1376171993 in words is "one billion, three hundred seventy-six million, one hundred seventy-one thousand, nine hundred ninety-three".