1381113591 has 128 divisors (see below), whose sum is σ = 2438553600. Its totient is φ = 682007040.

The previous prime is 1381113589. The next prime is 1381113593. The reversal of 1381113591 is 1953111831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1381113589) and next prime (1381113593).

It is not a de Polignac number, because 1381113591 - 2¹ = 1381113589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381113593) 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 127 ways as a sum of consecutive naturals, for example, 9936000 + ... + 9936138.

It is an arithmetic number, because the mean of its divisors is an integer number (19051200).

Almost surely, 2^1381113591 is an apocalyptic number.

1381113591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1381113591 is a deficient number, since it is larger than the sum of its proper divisors (1057440009).

1381113591 is a wasteful number, since it uses less digits than its factorization.

1381113591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its digits is 3240, while the sum is 33.

The square root of 1381113591 is about 37163.3366505216. The cubic root of 1381113591 is about 1113.6356699090.

The spelling of 1381113591 in words is "one billion, three hundred eighty-one million, one hundred thirteen thousand, five hundred ninety-one".