133439401 has 4 divisors (see below), whose sum is σ = 135267412. Its totient is φ = 131611392.

The previous prime is 133439387. The next prime is 133439431. The reversal of 133439401 is 104934331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63282025 + 70157376 = 7955^2 + 8376^2 .

It is a cyclic number.

It is not a de Polignac number, because 133439401 - 2¹⁹ = 132915113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133439401.

It is not an unprimeable number, because it can be changed into a prime (133439431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913896 + ... + 914041.

It is an arithmetic number, because the mean of its divisors is an integer number (33816853).

Almost surely, 2^133439401 is an apocalyptic number.

It is an amenable number.

133439401 is a deficient number, since it is larger than the sum of its proper divisors (1828011).

133439401 is an equidigital number, since it uses as much as digits as its factorization.

133439401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828010.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 133439401 is about 11551.5973354337. The cubic root of 133439401 is about 511.0083867788.

The spelling of 133439401 in words is "one hundred thirty-three million, four hundred thirty-nine thousand, four hundred one".