1374915749 has 4 divisors (see below), whose sum is σ = 1455793164. Its totient is φ = 1294038336.

The previous prime is 1374915739. The next prime is 1374915757. The reversal of 1374915749 is 9475194731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9475194731 = 167 ⋅56737693.

It can be written as a sum of positive squares in 2 ways, for example, as 479829025 + 895086724 = 21905^2 + 29918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1374915749 - 2¹² = 1374911653 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1374915697 and 1374915706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1374915709) 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, 40438682 + ... + 40438715.

It is an arithmetic number, because the mean of its divisors is an integer number (363948291).

Almost surely, 2^1374915749 is an apocalyptic number.

It is an amenable number.

1374915749 is a deficient number, since it is larger than the sum of its proper divisors (80877415).

1374915749 is an equidigital number, since it uses as much as digits as its factorization.

1374915749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80877414.

The product of its digits is 952560, while the sum is 50.

The square root of 1374915749 is about 37079.8563778233. The cubic root of 1374915749 is about 1111.9673329969.

The spelling of 1374915749 in words is "one billion, three hundred seventy-four million, nine hundred fifteen thousand, seven hundred forty-nine".