1381479441 has 4 divisors (see below), whose sum is σ = 1841972592. Its totient is φ = 920986292.

The previous prime is 1381479433. The next prime is 1381479469. The reversal of 1381479441 is 1449741831.

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 1381479441 - 2³ = 1381479433 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1381479393 and 1381479402.

It is not an unprimeable number, because it can be changed into a prime (1381479941) 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, 230246571 + ... + 230246576.

It is an arithmetic number, because the mean of its divisors is an integer number (460493148).

Almost surely, 2^1381479441 is an apocalyptic number.

It is an amenable number.

1381479441 is a deficient number, since it is larger than the sum of its proper divisors (460493151).

1381479441 is an equidigital number, since it uses as much as digits as its factorization.

1381479441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460493150.

The product of its digits is 96768, while the sum is 42.

The square root of 1381479441 is about 37168.2585144906. The cubic root of 1381479441 is about 1113.7339933786.

The spelling of 1381479441 in words is "one billion, three hundred eighty-one million, four hundred seventy-nine thousand, four hundred forty-one".