133431477 has 4 divisors (see below), whose sum is σ = 177908640. Its totient is φ = 88954316.

The previous prime is 133431439. The next prime is 133431481. The reversal of 133431477 is 774134331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133431477 - 2⁶ = 133431413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133431377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22238577 + ... + 22238582.

It is an arithmetic number, because the mean of its divisors is an integer number (44477160).

Almost surely, 2^133431477 is an apocalyptic number.

It is an amenable number.

133431477 is a deficient number, since it is larger than the sum of its proper divisors (44477163).

133431477 is an equidigital number, since it uses as much as digits as its factorization.

133431477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44477162.

The product of its digits is 21168, while the sum is 33.

The square root of 133431477 is about 11551.2543474724. The cubic root of 133431477 is about 510.9982715490.

The spelling of 133431477 in words is "one hundred thirty-three million, four hundred thirty-one thousand, four hundred seventy-seven".