1263918697 has 2 divisors, whose sum is σ = 1263918698. Its totient is φ = 1263918696.

The previous prime is 1263918659. The next prime is 1263918713. The reversal of 1263918697 is 7968193621.

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., 848207376 + 415711321 = 29124^2 + 20389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263918697 - 2¹⁵ = 1263885929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263918647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631959348 + 631959349.

It is an arithmetic number, because the mean of its divisors is an integer number (631959349).

Almost surely, 2^1263918697 is an apocalyptic number.

It is an amenable number.

1263918697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263918697 is an equidigital number, since it uses as much as digits as its factorization.

1263918697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 1263918697 is about 35551.6342381050. The cubic root of 1263918697 is about 1081.2008524911.

The spelling of 1263918697 in words is "one billion, two hundred sixty-three million, nine hundred eighteen thousand, six hundred ninety-seven".