1377243653 has 2 divisors, whose sum is σ = 1377243654. Its totient is φ = 1377243652.

The previous prime is 1377243641. The next prime is 1377243683. The reversal of 1377243653 is 3563427731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1316746369 + 60497284 = 36287^2 + 7778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377243653 - 2²⁰ = 1376195077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1377243653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377243613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688621826 + 688621827.

It is an arithmetic number, because the mean of its divisors is an integer number (688621827).

Almost surely, 2^1377243653 is an apocalyptic number.

It is an amenable number.

1377243653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377243653 is an equidigital number, since it uses as much as digits as its factorization.

1377243653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 41.

The square root of 1377243653 is about 37111.2335149345. The cubic root of 1377243653 is about 1112.5945456491.

The spelling of 1377243653 in words is "one billion, three hundred seventy-seven million, two hundred forty-three thousand, six hundred fifty-three".