1374644405 has 4 divisors (see below), whose sum is σ = 1649573292. Its totient is φ = 1099715520.

The previous prime is 1374644347. The next prime is 1374644407. The reversal of 1374644405 is 5044464731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 840942001 + 533702404 = 28999^2 + 23102^2 .

It is not a de Polignac number, because 1374644405 - 2⁸ = 1374644149 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 (1374644407) 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, 137464436 + ... + 137464445.

It is an arithmetic number, because the mean of its divisors is an integer number (412393323).

Almost surely, 2^1374644405 is an apocalyptic number.

It is an amenable number.

1374644405 is a deficient number, since it is larger than the sum of its proper divisors (274928887).

1374644405 is an equidigital number, since it uses as much as digits as its factorization.

1374644405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274928886.

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 1374644405 is about 37076.1972834324. The cubic root of 1374644405 is about 1111.8941780866.

The spelling of 1374644405 in words is "one billion, three hundred seventy-four million, six hundred forty-four thousand, four hundred five".