1263926213 has 4 divisors (see below), whose sum is σ = 1378828608. Its totient is φ = 1149023820.

The previous prime is 1263926171. The next prime is 1263926231. The reversal of 1263926213 is 3126293621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1263926213 - 2¹² = 1263922117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263926273) 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 in 3 ways as a sum of consecutive naturals, for example, 57451181 + ... + 57451202.

It is an arithmetic number, because the mean of its divisors is an integer number (344707152).

Almost surely, 2^1263926213 is an apocalyptic number.

It is an amenable number.

1263926213 is a deficient number, since it is larger than the sum of its proper divisors (114902395).

1263926213 is a wasteful number, since it uses less digits than its factorization.

1263926213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114902394.

The product of its digits is 23328, while the sum is 35.

The square root of 1263926213 is about 35551.7399433558. The cubic root of 1263926213 is about 1081.2029956378.

The spelling of 1263926213 in words is "one billion, two hundred sixty-three million, nine hundred twenty-six thousand, two hundred thirteen".