1275378823 has 2 divisors, whose sum is σ = 1275378824. Its totient is φ = 1275378822.

The previous prime is 1275378799. The next prime is 1275378829. The reversal of 1275378823 is 3288735721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1275378823 - 2¹⁷ = 1275247751 is a prime.

It is a super-2 number, since 2×1275378823² = 3253182284313730658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1275378829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637689411 + 637689412.

It is an arithmetic number, because the mean of its divisors is an integer number (637689412).

Almost surely, 2^1275378823 is an apocalyptic number.

1275378823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275378823 is an equidigital number, since it uses as much as digits as its factorization.

1275378823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 1275378823 is about 35712.4463317763. The cubic root of 1275378823 is about 1084.4588247402.

The spelling of 1275378823 in words is "one billion, two hundred seventy-five million, three hundred seventy-eight thousand, eight hundred twenty-three".