133439505 has 16 divisors (see below), whose sum is σ = 215706624. Its totient is φ = 70433280.

The previous prime is 133439503. The next prime is 133439519. The reversal of 133439505 is 505934331.

It is not a de Polignac number, because 133439505 - 2¹ = 133439503 is a prime.

It is a super-2 number, since 2×133439505² = 35612202989290050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133439503) 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, 44401 + ... + 47310.

It is an arithmetic number, because the mean of its divisors is an integer number (13481664).

Almost surely, 2^133439505 is an apocalyptic number.

133439505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133439505 is a deficient number, since it is larger than the sum of its proper divisors (82267119).

133439505 is an equidigital number, since it uses as much as digits as its factorization.

133439505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91816.

The product of its (nonzero) digits is 24300, while the sum is 33.

The square root of 133439505 is about 11551.6018369748. The cubic root of 133439505 is about 511.0085195353.

The spelling of 133439505 in words is "one hundred thirty-three million, four hundred thirty-nine thousand, five hundred five".