1263488377 has 2 divisors, whose sum is σ = 1263488378. Its totient is φ = 1263488376.

The previous prime is 1263488351. The next prime is 1263488389. The reversal of 1263488377 is 7738843621.

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., 1263020521 + 467856 = 35539^2 + 684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263488377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1263488377.

It is not a weakly prime, because it can be changed into another prime (1263488777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631744188 + 631744189.

It is an arithmetic number, because the mean of its divisors is an integer number (631744189).

Almost surely, 2^1263488377 is an apocalyptic number.

It is an amenable number.

1263488377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263488377 is an equidigital number, since it uses as much as digits as its factorization.

1263488377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The square root of 1263488377 is about 35545.5816804283. The cubic root of 1263488377 is about 1081.0781349029.

The spelling of 1263488377 in words is "one billion, two hundred sixty-three million, four hundred eighty-eight thousand, three hundred seventy-seven".