133185490 has 8 divisors (see below), whose sum is σ = 239733900. Its totient is φ = 53274192.

The previous prime is 133185469. The next prime is 133185601. The reversal of 133185490 is 94581331.

It can be written as a sum of positive squares in 2 ways, for example, as 131951169 + 1234321 = 11487^2 + 1111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 6659265 + ... + 6659284.

Almost surely, 2^133185490 is an apocalyptic number.

133185490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133185490 is a deficient number, since it is larger than the sum of its proper divisors (106548410).

133185490 is a wasteful number, since it uses less digits than its factorization.

133185490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13318556.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 133185490 is about 11540.6018040655. The cubic root of 133185490 is about 510.6840621941.

The spelling of 133185490 in words is "one hundred thirty-three million, one hundred eighty-five thousand, four hundred ninety".