133909493 has 8 divisors (see below), whose sum is σ = 142426368. Its totient is φ = 125463744.

The previous prime is 133909471. The next prime is 133909541. The reversal of 133909493 is 394909331.

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 133909493 - 2²² = 129715189 is a prime.

It is a super-3 number, since 3×133909493³ (a number of 25 digits) contains 333 as substring.

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 133909493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133909453) 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, 13871 + ... + 21452.

It is an arithmetic number, because the mean of its divisors is an integer number (17803296).

Almost surely, 2^133909493 is an apocalyptic number.

It is an amenable number.

133909493 is a deficient number, since it is larger than the sum of its proper divisors (8516875).

133909493 is a wasteful number, since it uses less digits than its factorization.

133909493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35563.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 133909493 is about 11571.9269354762. The cubic root of 133909493 is about 511.6077585113.

The spelling of 133909493 in words is "one hundred thirty-three million, nine hundred nine thousand, four hundred ninety-three".