133129477 has 8 divisors (see below), whose sum is σ = 143545976. Its totient is φ = 122738112.

The previous prime is 133129471. The next prime is 133129487. The reversal of 133129477 is 774921331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40373316 + 92756161 = 6354^2 + 9631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133129477 - 2¹⁵ = 133096709 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 (133129471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5563 + ... + 17239.

It is an arithmetic number, because the mean of its divisors is an integer number (17943247).

Almost surely, 2^133129477 is an apocalyptic number.

It is an amenable number.

133129477 is a deficient number, since it is larger than the sum of its proper divisors (10416499).

133129477 is a wasteful number, since it uses less digits than its factorization.

133129477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12567.

The product of its digits is 31752, while the sum is 37.

The square root of 133129477 is about 11538.1747690005. The cubic root of 133129477 is about 510.6124604068.

It can be divided in two parts, 13312 and 9477, that multiplied together give a square (126157824 = 11232²).

The spelling of 133129477 in words is "one hundred thirty-three million, one hundred twenty-nine thousand, four hundred seventy-seven".