133987436 has 12 divisors (see below), whose sum is σ = 255794280. Its totient is φ = 60903360.

The previous prime is 133987429. The next prime is 133987439. The reversal of 133987436 is 634789331.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 3045169 = 133987436 / (1 + 3 + 3 + 9 + 8 + 7 + 4 + 3 + 6).

It is not an unprimeable number, because it can be changed into a prime (133987439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522541 + ... + 1522628.

It is an arithmetic number, because the mean of its divisors is an integer number (21316190).

Almost surely, 2^133987436 is an apocalyptic number.

It is an amenable number.

133987436 is a deficient number, since it is larger than the sum of its proper divisors (121806844).

133987436 is a wasteful number, since it uses less digits than its factorization.

133987436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045184 (or 3045182 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 133987436 is about 11575.2942079240. The cubic root of 133987436 is about 511.7070009383.

The spelling of 133987436 in words is "one hundred thirty-three million, nine hundred eighty-seven thousand, four hundred thirty-six".