133278687 has 12 divisors (see below), whose sum is σ = 193357320. Its totient is φ = 88463088.

The previous prime is 133278671. The next prime is 133278689. The reversal of 133278687 is 786872331.

It is not a de Polignac number, because 133278687 - 2⁴ = 133278671 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133278689) 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, 30273 + ... + 34394.

It is an arithmetic number, because the mean of its divisors is an integer number (16113110).

Almost surely, 2^133278687 is an apocalyptic number.

133278687 is a deficient number, since it is larger than the sum of its proper divisors (60078633).

133278687 is a wasteful number, since it uses less digits than its factorization.

133278687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64902 (or 64899 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 133278687 is about 11544.6388856473. The cubic root of 133278687 is about 510.8031520575.

The spelling of 133278687 in words is "one hundred thirty-three million, two hundred seventy-eight thousand, six hundred eighty-seven".