133431277 has 4 divisors (see below), whose sum is σ = 152492896. Its totient is φ = 114369660.

The previous prime is 133431271. The next prime is 133431289. The reversal of 133431277 is 772134331.

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 133431277 - 2⁷ = 133431149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133431271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9530799 + ... + 9530812.

It is an arithmetic number, because the mean of its divisors is an integer number (38123224).

Almost surely, 2^133431277 is an apocalyptic number.

It is an amenable number.

133431277 is a deficient number, since it is larger than the sum of its proper divisors (19061619).

133431277 is an equidigital number, since it uses as much as digits as its factorization.

133431277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19061618.

The product of its digits is 10584, while the sum is 31.

The square root of 133431277 is about 11551.2456904007. The cubic root of 133431277 is about 510.9980162376.

The spelling of 133431277 in words is "one hundred thirty-three million, four hundred thirty-one thousand, two hundred seventy-seven".