133579999 has 16 divisors (see below), whose sum is σ = 163867968. Its totient is φ = 106278912.

The previous prime is 133579939. The next prime is 133580017. The reversal of 133579999 is 999975331.

It is a cyclic number.

It is not a de Polignac number, because 133579999 - 2⁹ = 133579487 is a prime.

It is a super-2 number, since 2×133579999² = 35687232265680002, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133579909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 999 + ... + 16375.

It is an arithmetic number, because the mean of its divisors is an integer number (10241748).

Almost surely, 2^133579999 is an apocalyptic number.

133579999 is a deficient number, since it is larger than the sum of its proper divisors (30287969).

133579999 is a wasteful number, since it uses less digits than its factorization.

133579999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15474.

The product of its digits is 2066715, while the sum is 55.

The square root of 133579999 is about 11557.6813851222. The cubic root of 133579999 is about 511.1877979014.

The spelling of 133579999 in words is "one hundred thirty-three million, five hundred seventy-nine thousand, nine hundred ninety-nine".