133087785 has 32 divisors (see below), whose sum is σ = 218529792. Its totient is φ = 69132480.

The previous prime is 133087771. The next prime is 133087789. The reversal of 133087785 is 587780331.

It is not a de Polignac number, because 133087785 - 2²¹ = 130990633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133087789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218952 + ... + 219558.

It is an arithmetic number, because the mean of its divisors is an integer number (6829056).

Almost surely, 2^133087785 is an apocalyptic number.

133087785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133087785 is a deficient number, since it is larger than the sum of its proper divisors (85442007).

133087785 is a wasteful number, since it uses less digits than its factorization.

133087785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 133087785 is about 11536.3679292921. The cubic root of 133087785 is about 510.5591522092.

The spelling of 133087785 in words is "one hundred thirty-three million, eighty-seven thousand, seven hundred eighty-five".