134579991 has 16 divisors (see below), whose sum is σ = 220849664. Its totient is φ = 70987104.

The previous prime is 134579971. The next prime is 134580013. The reversal of 134579991 is 199975431.

It is not a de Polignac number, because 134579991 - 2¹⁴ = 134563607 is a prime.

It is a super-2 number, since 2×134579991² = 36223547955120162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 134579991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134579971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246211 + ... + 246756.

It is an arithmetic number, because the mean of its divisors is an integer number (13803104).

Almost surely, 2^134579991 is an apocalyptic number.

134579991 is a deficient number, since it is larger than the sum of its proper divisors (86269673).

134579991 is a wasteful number, since it uses less digits than its factorization.

134579991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492990.

The product of its digits is 306180, while the sum is 48.

The square root of 134579991 is about 11600.8616490328. The cubic root of 134579991 is about 512.4602274112.

The spelling of 134579991 in words is "one hundred thirty-four million, five hundred seventy-nine thousand, nine hundred ninety-one".