44139757 has 2 divisors, whose sum is σ = 44139758. Its totient is φ = 44139756.

The previous prime is 44139751. The next prime is 44139773. The reversal of 44139757 is 75793144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40525956 + 3613801 = 6366^2 + 1901^2 .

It is a cyclic number.

It is not a de Polignac number, because 44139757 - 2¹⁵ = 44106989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44139751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22069878 + 22069879.

It is an arithmetic number, because the mean of its divisors is an integer number (22069879).

Almost surely, 2^44139757 is an apocalyptic number.

It is an amenable number.

44139757 is a deficient number, since it is larger than the sum of its proper divisors (1).

44139757 is an equidigital number, since it uses as much as digits as its factorization.

44139757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 44139757 is about 6643.7758089809. The cubic root of 44139757 is about 353.4082194622.

The spelling of 44139757 in words is "forty-four million, one hundred thirty-nine thousand, seven hundred fifty-seven".