44640133 has 2 divisors, whose sum is σ = 44640134. Its totient is φ = 44640132.

The previous prime is 44640131. The next prime is 44640161. The reversal of 44640133 is 33104644.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41705764 + 2934369 = 6458^2 + 1713^2 .

It is a cyclic number.

It is not a de Polignac number, because 44640133 - 2¹ = 44640131 is a prime.

It is a super-3 number, since 3×44640133³ (a number of 24 digits) contains 333 as substring.

Together with 44640131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 44640098 and 44640107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44640131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22320066 + 22320067.

It is an arithmetic number, because the mean of its divisors is an integer number (22320067).

Almost surely, 2^44640133 is an apocalyptic number.

It is an amenable number.

44640133 is a deficient number, since it is larger than the sum of its proper divisors (1).

44640133 is an equidigital number, since it uses as much as digits as its factorization.

44640133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 44640133 is about 6681.3271885158. The cubic root of 44640133 is about 354.7386372206.

Adding to 44640133 its reverse (33104644), we get a palindrome (77744777).

The spelling of 44640133 in words is "forty-four million, six hundred forty thousand, one hundred thirty-three".