1375253749 has 2 divisors, whose sum is σ = 1375253750. Its totient is φ = 1375253748.

The previous prime is 1375253729. The next prime is 1375253771. The reversal of 1375253749 is 9473525731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1133668900 + 241584849 = 33670^2 + 15543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375253749 - 2⁵ = 1375253717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1375253699 and 1375253708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375253729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687626874 + 687626875.

It is an arithmetic number, because the mean of its divisors is an integer number (687626875).

Almost surely, 2^1375253749 is an apocalyptic number.

It is an amenable number.

1375253749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375253749 is an equidigital number, since it uses as much as digits as its factorization.

1375253749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 46.

The square root of 1375253749 is about 37084.4138284536. The cubic root of 1375253749 is about 1112.0584450438.

The spelling of 1375253749 in words is "one billion, three hundred seventy-five million, two hundred fifty-three thousand, seven hundred forty-nine".