1447445557 has 2 divisors, whose sum is σ = 1447445558. Its totient is φ = 1447445556.

The previous prime is 1447445471. The next prime is 1447445561. The reversal of 1447445557 is 7555447441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1437243921 + 10201636 = 37911^2 + 3194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1447445557 - 2⁷ = 1447445429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1447445057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 723722778 + 723722779.

It is an arithmetic number, because the mean of its divisors is an integer number (723722779).

Almost surely, 2^1447445557 is an apocalyptic number.

It is an amenable number.

1447445557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1447445557 is an equidigital number, since it uses as much as digits as its factorization.

1447445557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568000, while the sum is 46.

The square root of 1447445557 is about 38045.3092640867. The cubic root of 1447445557 is about 1131.1861502499.

It can be divided in two parts, 14474 and 45557, that added together give a triangular number (60031 = T₃₄₆).

The spelling of 1447445557 in words is "one billion, four hundred forty-seven million, four hundred forty-five thousand, five hundred fifty-seven".