133810407 has 32 divisors (see below), whose sum is σ = 212256000. Its totient is φ = 83060640.

The previous prime is 133810403. The next prime is 133810427. The reversal of 133810407 is 704018331.

It is not a de Polignac number, because 133810407 - 2² = 133810403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133810403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28057 + ... + 32477.

It is an arithmetic number, because the mean of its divisors is an integer number (6633000).

Almost surely, 2^133810407 is an apocalyptic number.

133810407 is a deficient number, since it is larger than the sum of its proper divisors (78445593).

133810407 is a wasteful number, since it uses less digits than its factorization.

133810407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508 (or 4502 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 133810407 is about 11567.6448337594. The cubic root of 133810407 is about 511.4815397402.

Adding to 133810407 its reverse (704018331), we get a palindrome (837828738).

The spelling of 133810407 in words is "one hundred thirty-three million, eight hundred ten thousand, four hundred seven".