133493418 has 24 divisors (see below), whose sum is σ = 306250308. Its totient is φ = 41880192.

The previous prime is 133493407. The next prime is 133493429. The reversal of 133493418 is 814394331.

It is an interprime number because it is at equal distance from previous prime (133493407) and next prime (133493429).

It can be written as a sum of positive squares in 2 ways, for example, as 133471809 + 21609 = 11553^2 + 147^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 217821 + ... + 218432.

Almost surely, 2^133493418 is an apocalyptic number.

133493418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

133493418 is an abundant number, since it is smaller than the sum of its proper divisors (172756890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133493418 is a wasteful number, since it uses less digits than its factorization.

133493418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436278 (or 436275 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 133493418 is about 11553.9351737839. The cubic root of 133493418 is about 511.0773304741.

The spelling of 133493418 in words is "one hundred thirty-three million, four hundred ninety-three thousand, four hundred eighteen".