133895990 has 8 divisors (see below), whose sum is σ = 241012800. Its totient is φ = 53558392.

The previous prime is 133895981. The next prime is 133896011. The reversal of 133895990 is 99598331.

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

It is a super-2 number, since 2×133895990² = 35856272276160200, which contains 22 as substring.

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, 6694790 + ... + 6694809.

It is an arithmetic number, because the mean of its divisors is an integer number (30126600).

Almost surely, 2^133895990 is an apocalyptic number.

133895990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133895990 is a deficient number, since it is larger than the sum of its proper divisors (107116810).

133895990 is a wasteful number, since it uses less digits than its factorization.

133895990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13389606.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 133895990 is about 11571.3434829323. The cubic root of 133895990 is about 511.5905616429.

The spelling of 133895990 in words is "one hundred thirty-three million, eight hundred ninety-five thousand, nine hundred ninety".