133491019447 has 4 divisors (see below), whose sum is σ = 134738599176. Its totient is φ = 132243439720.

The previous prime is 133491019439. The next prime is 133491019471. The reversal of 133491019447 is 744910194331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 133491019447 - 2³ = 133491019439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133491019397 and 133491019406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133491019247) 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, 623789704 + ... + 623789917.

It is an arithmetic number, because the mean of its divisors is an integer number (33684649794).

Almost surely, 2^133491019447 is an apocalyptic number.

133491019447 is a deficient number, since it is larger than the sum of its proper divisors (1247579729).

133491019447 is a wasteful number, since it uses less digits than its factorization.

133491019447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247579728.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 133491019447 in words is "one hundred thirty-three billion, four hundred ninety-one million, nineteen thousand, four hundred forty-seven".