133502407 has 4 divisors (see below), whose sum is σ = 133874640. Its totient is φ = 133130176.

The previous prime is 133502387. The next prime is 133502423. The reversal of 133502407 is 704205331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133502407 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 (133502477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185578 + ... + 186295.

It is an arithmetic number, because the mean of its divisors is an integer number (33468660).

Almost surely, 2^133502407 is an apocalyptic number.

133502407 is a deficient number, since it is larger than the sum of its proper divisors (372233).

133502407 is an equidigital number, since it uses as much as digits as its factorization.

133502407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372232.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 133502407 is about 11554.3241688988. The cubic root of 133502407 is about 511.0888016290.

Adding to 133502407 its reverse (704205331), we get a palindrome (837707738).

The spelling of 133502407 in words is "one hundred thirty-three million, five hundred two thousand, four hundred seven".