133999959 has 4 divisors (see below), whose sum is σ = 178666616. Its totient is φ = 89333304.

The previous prime is 133999939. The next prime is 133999979. The reversal of 133999959 is 959999331.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (133999939) and next prime (133999979).

It is not a de Polignac number, because 133999959 - 2⁹ = 133999447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133999899 and 133999908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133999919) 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 3 ways as a sum of consecutive naturals, for example, 22333324 + ... + 22333329.

It is an arithmetic number, because the mean of its divisors is an integer number (44666654).

Almost surely, 2^133999959 is an apocalyptic number.

133999959 is a deficient number, since it is larger than the sum of its proper divisors (44666657).

133999959 is an equidigital number, since it uses as much as digits as its factorization.

133999959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44666656.

The product of its digits is 2657205, while the sum is 57.

The square root of 133999959 is about 11575.8351318598. The cubic root of 133999959 is about 511.7229425005.

The spelling of 133999959 in words is "one hundred thirty-three million, nine hundred ninety-nine thousand, nine hundred fifty-nine".