44640061 has 2 divisors, whose sum is σ = 44640062. Its totient is φ = 44640060.

The previous prime is 44640059. The next prime is 44640067. The reversal of 44640061 is 16004644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38514436 + 6125625 = 6206^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 44640061 - 2¹ = 44640059 is a prime.

Together with 44640059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44640067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22320030 + 22320031.

It is an arithmetic number, because the mean of its divisors is an integer number (22320031).

Almost surely, 2^44640061 is an apocalyptic number.

It is an amenable number.

44640061 is a deficient number, since it is larger than the sum of its proper divisors (1).

44640061 is an equidigital number, since it uses as much as digits as its factorization.

44640061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 44640061 is about 6681.3218003626. The cubic root of 44640061 is about 354.7384465013.

The spelling of 44640061 in words is "forty-four million, six hundred forty thousand, sixty-one".