133753887 has 12 divisors (see below), whose sum is σ = 199862520. Its totient is φ = 86094288.

The previous prime is 133753859. The next prime is 133753891. The reversal of 133753887 is 788357331.

133753887 is a `hidden beast` number, since 1 + 3 + 37 + 538 + 87 = 666.

It is not a de Polignac number, because 133753887 - 2²⁰ = 132705311 is a prime.

It is a super-4 number, since 4×133753887⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133753897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255973 + ... + 256494.

It is an arithmetic number, because the mean of its divisors is an integer number (16655210).

Almost surely, 2^133753887 is an apocalyptic number.

133753887 is a deficient number, since it is larger than the sum of its proper divisors (66108633).

133753887 is a wasteful number, since it uses less digits than its factorization.

133753887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512502 (or 512499 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 133753887 is about 11565.2015546639. The cubic root of 133753887 is about 511.4095149291.

The spelling of 133753887 in words is "one hundred thirty-three million, seven hundred fifty-three thousand, eight hundred eighty-seven".