44142661 has 2 divisors, whose sum is σ = 44142662. Its totient is φ = 44142660.

The previous prime is 44142649. The next prime is 44142689. The reversal of 44142661 is 16624144.

It is an a-pointer prime, because the next prime (44142689) can be obtained adding 44142661 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 185761 = 6630^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 44142661 - 2⁵ = 44142629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44142601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22071330 + 22071331.

It is an arithmetic number, because the mean of its divisors is an integer number (22071331).

Almost surely, 2^44142661 is an apocalyptic number.

It is an amenable number.

44142661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44142661 is an equidigital number, since it uses as much as digits as its factorization.

44142661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

The square root of 44142661 is about 6643.9943558074. The cubic root of 44142661 is about 353.4159696556.

The spelling of 44142661 in words is "forty-four million, one hundred forty-two thousand, six hundred sixty-one".