133009631 has 8 divisors (see below), whose sum is σ = 137803680. Its totient is φ = 128229472.

The previous prime is 133009619. The next prime is 133009651. The reversal of 133009631 is 136900331.

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 133009631 - 2¹⁴ = 132993247 is a prime.

It is a super-2 number, since 2×133009631² = 35383123877512322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133009631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133009651) 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, 18461 + ... + 24633.

It is an arithmetic number, because the mean of its divisors is an integer number (17225460).

Almost surely, 2^133009631 is an apocalyptic number.

133009631 is a deficient number, since it is larger than the sum of its proper divisors (4794049).

133009631 is an equidigital number, since it uses as much as digits as its factorization.

133009631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 133009631 is about 11532.9801439177. The cubic root of 133009631 is about 510.4591929900.

Adding to 133009631 its reverse (136900331), we get a palindrome (269909962).

The spelling of 133009631 in words is "one hundred thirty-three million, nine thousand, six hundred thirty-one".