133913420 has 24 divisors (see below), whose sum is σ = 297761184. Its totient is φ = 50414336.

The previous prime is 133913419. The next prime is 133913441. The reversal of 133913420 is 24319331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 133913420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196592 + ... + 197271.

It is an arithmetic number, because the mean of its divisors is an integer number (12406716).

Almost surely, 2^133913420 is an apocalyptic number.

133913420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133913420 is an abundant number, since it is smaller than the sum of its proper divisors (163847764).

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

133913420 is a wasteful number, since it uses less digits than its factorization.

133913420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393889 (or 393887 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 133913420 is about 11572.0966121097. The cubic root of 133913420 is about 511.6127595608.

The spelling of 133913420 in words is "one hundred thirty-three million, nine hundred thirteen thousand, four hundred twenty".