133941487 has 4 divisors (see below), whose sum is σ = 141820416. Its totient is φ = 126062560.

The previous prime is 133941481. The next prime is 133941491. The reversal of 133941487 is 784149331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784149331 = 7 ⋅112021333.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133941487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133941481) 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, 3939439 + ... + 3939472.

It is an arithmetic number, because the mean of its divisors is an integer number (35455104).

Almost surely, 2^133941487 is an apocalyptic number.

133941487 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

133941487 is a deficient number, since it is larger than the sum of its proper divisors (7878929).

133941487 is an equidigital number, since it uses as much as digits as its factorization.

133941487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878928.

The product of its digits is 72576, while the sum is 40.

The square root of 133941487 is about 11573.3092501670. The cubic root of 133941487 is about 511.6485001467.

The spelling of 133941487 in words is "one hundred thirty-three million, nine hundred forty-one thousand, four hundred eighty-seven".