133190865 has 16 divisors (see below), whose sum is σ = 236784000. Its totient is φ = 71035056.

The previous prime is 133190851. The next prime is 133190917. The reversal of 133190865 is 568091331.

It is a happy number.

It is not a de Polignac number, because 133190865 - 2¹⁰ = 133189841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493165 + ... + 493434.

It is an arithmetic number, because the mean of its divisors is an integer number (14799000).

Almost surely, 2^133190865 is an apocalyptic number.

133190865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133190865 is a deficient number, since it is larger than the sum of its proper divisors (103593135).

133190865 is an equidigital number, since it uses as much as digits as its factorization.

133190865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986613 (or 986607 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 133190865 is about 11540.8346751871. The cubic root of 133190865 is about 510.6909320363.

The spelling of 133190865 in words is "one hundred thirty-three million, one hundred ninety thousand, eight hundred sixty-five".