133479983 has 16 divisors (see below), whose sum is σ = 165802560. Its totient is φ = 104633856.

The previous prime is 133479949. The next prime is 133479991. The reversal of 133479983 is 389974331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133479983 - 2⁶ = 133479919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133479383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3191 + ... + 16647.

It is an arithmetic number, because the mean of its divisors is an integer number (10362660).

Almost surely, 2^133479983 is an apocalyptic number.

133479983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133479983 is a deficient number, since it is larger than the sum of its proper divisors (32322577).

133479983 is a wasteful number, since it uses less digits than its factorization.

133479983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13586.

The product of its digits is 489888, while the sum is 47.

The square root of 133479983 is about 11553.3537555119. The cubic root of 133479983 is about 511.0601846742.

The spelling of 133479983 in words is "one hundred thirty-three million, four hundred seventy-nine thousand, nine hundred eighty-three".