144640757 has 2 divisors, whose sum is σ = 144640758. Its totient is φ = 144640756.

The previous prime is 144640723. The next prime is 144640789. The reversal of 144640757 is 757046441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143017681 + 1623076 = 11959^2 + 1274^2 .

It is a cyclic number.

It is not a de Polignac number, because 144640757 - 2⁸ = 144640501 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144640757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144640157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72320378 + 72320379.

It is an arithmetic number, because the mean of its divisors is an integer number (72320379).

Almost surely, 2^144640757 is an apocalyptic number.

It is an amenable number.

144640757 is a deficient number, since it is larger than the sum of its proper divisors (1).

144640757 is an equidigital number, since it uses as much as digits as its factorization.

144640757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 144640757 is about 12026.6685744640. The cubic root of 144640757 is about 524.9245630083.

The spelling of 144640757 in words is "one hundred forty-four million, six hundred forty thousand, seven hundred fifty-seven".