1263923957 has 2 divisors, whose sum is σ = 1263923958. Its totient is φ = 1263923956.

The previous prime is 1263923951. The next prime is 1263923963. The reversal of 1263923957 is 7593293621.

It is a balanced prime because it is at equal distance from previous prime (1263923951) and next prime (1263923963).

It can be written as a sum of positive squares in only one way, i.e., 760325476 + 503598481 = 27574^2 + 22441^2 .

It is an emirp because it is prime and its reverse (7593293621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263923957 - 2⁶ = 1263923893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263923951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631961978 + 631961979.

It is an arithmetic number, because the mean of its divisors is an integer number (631961979).

Almost surely, 2^1263923957 is an apocalyptic number.

It is an amenable number.

1263923957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263923957 is an equidigital number, since it uses as much as digits as its factorization.

1263923957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 47.

The square root of 1263923957 is about 35551.7082149367. The cubic root of 1263923957 is about 1081.2023523525.

The spelling of 1263923957 in words is "one billion, two hundred sixty-three million, nine hundred twenty-three thousand, nine hundred fifty-seven".