133717631 has 8 divisors (see below), whose sum is σ = 141729120. Its totient is φ = 125722368.

The previous prime is 133717627. The next prime is 133717651. The reversal of 133717631 is 136717331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133717631 - 2² = 133717627 is a prime.

It is a super-2 number, since 2×133717631² = 35760809680504322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133717621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15710 + ... + 22676.

It is an arithmetic number, because the mean of its divisors is an integer number (17716140).

Almost surely, 2^133717631 is an apocalyptic number.

133717631 is a deficient number, since it is larger than the sum of its proper divisors (8011489).

133717631 is a wasteful number, since it uses less digits than its factorization.

133717631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8113.

The product of its digits is 7938, while the sum is 32.

The square root of 133717631 is about 11563.6339876355. The cubic root of 133717631 is about 511.3633023433.

The spelling of 133717631 in words is "one hundred thirty-three million, seven hundred seventeen thousand, six hundred thirty-one".