133393730 has 48 divisors (see below), whose sum is σ = 258152616. Its totient is φ = 49612800.

The previous prime is 133393723. The next prime is 133393751. The reversal of 133393730 is 37393331.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 107516161 + 25877569 = 10369^2 + 5087^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291662 + ... + 292118.

Almost surely, 2^133393730 is an apocalyptic number.

133393730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133393730 is a deficient number, since it is larger than the sum of its proper divisors (124758886).

133393730 is a wasteful number, since it uses less digits than its factorization.

133393730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 32.

The square root of 133393730 is about 11549.6203400804. The cubic root of 133393730 is about 510.9500808438.

The spelling of 133393730 in words is "one hundred thirty-three million, three hundred ninety-three thousand, seven hundred thirty".