133910387 has 16 divisors (see below), whose sum is σ = 148425312. Its totient is φ = 120026880.

The previous prime is 133910333. The next prime is 133910389. The reversal of 133910387 is 783019331.

It is a cyclic number.

It is not a de Polignac number, because 133910387 - 2²⁰ = 132861811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133910389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147188 + ... + 148094.

It is an arithmetic number, because the mean of its divisors is an integer number (9276582).

Almost surely, 2^133910387 is an apocalyptic number.

133910387 is a deficient number, since it is larger than the sum of its proper divisors (14514925).

133910387 is a wasteful number, since it uses less digits than its factorization.

133910387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 133910387 is about 11571.9655633777. The cubic root of 133910387 is about 511.6088970323.

The spelling of 133910387 in words is "one hundred thirty-three million, nine hundred ten thousand, three hundred eighty-seven".