133138099 has 16 divisors (see below), whose sum is σ = 144187200. Its totient is φ = 122601600.

The previous prime is 133138097. The next prime is 133138121. The reversal of 133138099 is 990831331.

It is a cyclic number.

It is not a de Polignac number, because 133138099 - 2¹ = 133138097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133138091) 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, 85177 + ... + 86725.

It is an arithmetic number, because the mean of its divisors is an integer number (9011700).

Almost surely, 2^133138099 is an apocalyptic number.

133138099 is a deficient number, since it is larger than the sum of its proper divisors (11049101).

133138099 is a wasteful number, since it uses less digits than its factorization.

133138099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 133138099 is about 11538.5483922372. The cubic root of 133138099 is about 510.6234832739.

It can be divided in two parts, 13313 and 8099, that added together give a palindrome (21412).

The spelling of 133138099 in words is "one hundred thirty-three million, one hundred thirty-eight thousand, ninety-nine".