1381537263 has 16 divisors (see below), whose sum is σ = 1859155200. Its totient is φ = 912500160.

The previous prime is 1381537237. The next prime is 1381537277. The reversal of 1381537263 is 3627351831.

It is not a de Polignac number, because 1381537263 - 2²⁶ = 1314428399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381537363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214078 + ... + 220436.

It is an arithmetic number, because the mean of its divisors is an integer number (116197200).

Almost surely, 2^1381537263 is an apocalyptic number.

1381537263 is a deficient number, since it is larger than the sum of its proper divisors (477617937).

1381537263 is a wasteful number, since it uses less digits than its factorization.

1381537263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7022.

The product of its digits is 90720, while the sum is 39.

The square root of 1381537263 is about 37169.0363474761. The cubic root of 1381537263 is about 1113.7495316551.

The spelling of 1381537263 in words is "one billion, three hundred eighty-one million, five hundred thirty-seven thousand, two hundred sixty-three".