133391870 has 8 divisors (see below), whose sum is σ = 240105384. Its totient is φ = 53356744.

The previous prime is 133391857. The next prime is 133391893. The reversal of 133391870 is 78193331.

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

It is a self number, because there is not a number n which added to its sum of digits gives 133391870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6669584 + ... + 6669603.

It is an arithmetic number, because the mean of its divisors is an integer number (30013173).

Almost surely, 2^133391870 is an apocalyptic number.

133391870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133391870 is a deficient number, since it is larger than the sum of its proper divisors (106713514).

133391870 is a wasteful number, since it uses less digits than its factorization.

133391870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13339194.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 133391870 is about 11549.5398176724. The cubic root of 133391870 is about 510.9477059906.

The spelling of 133391870 in words is "one hundred thirty-three million, three hundred ninety-one thousand, eight hundred seventy".