1263380831 has 4 divisors (see below), whose sum is σ = 1263683664. Its totient is φ = 1263078000.

The previous prime is 1263380819. The next prime is 1263380843. The reversal of 1263380831 is 1380833621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1380833621 = 17573 ⋅78577.

It is an interprime number because it is at equal distance from previous prime (1263380819) and next prime (1263380843).

It is a cyclic number.

It is not a de Polignac number, because 1263380831 - 2¹⁸ = 1263118687 is a prime.

It is a super-2 number, since 2×1263380831² = 3192262248276501122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263380791 and 1263380800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263383831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145070 + ... + 153531.

It is an arithmetic number, because the mean of its divisors is an integer number (315920916).

Almost surely, 2^1263380831 is an apocalyptic number.

1263380831 is a deficient number, since it is larger than the sum of its proper divisors (302833).

1263380831 is an equidigital number, since it uses as much as digits as its factorization.

1263380831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302832.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1263380831 is about 35544.0688582498. The cubic root of 1263380831 is about 1081.0474608500.

The spelling of 1263380831 in words is "one billion, two hundred sixty-three million, three hundred eighty thousand, eight hundred thirty-one".