133387583881 has 4 divisors (see below), whose sum is σ = 133394960512. Its totient is φ = 133380207252.

The previous prime is 133387583867. The next prime is 133387583893. The reversal of 133387583881 is 188385783331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133387583881 - 2¹³ = 133387575689 is a prime.

It is a super-2 number, since 2×133387583881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133387583851) 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, 3661125 + ... + 3697378.

It is an arithmetic number, because the mean of its divisors is an integer number (33348740128).

Almost surely, 2^133387583881 is an apocalyptic number.

It is an amenable number.

133387583881 is a deficient number, since it is larger than the sum of its proper divisors (7376631).

133387583881 is an equidigital number, since it uses as much as digits as its factorization.

133387583881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7376630.

The product of its digits is 11612160, while the sum is 58.

The spelling of 133387583881 in words is "one hundred thirty-three billion, three hundred eighty-seven million, five hundred eighty-three thousand, eight hundred eighty-one".