1263790923 has 8 divisors (see below), whose sum is σ = 1687661568. Its totient is φ = 841223784.

The previous prime is 1263790921. The next prime is 1263790937. The reversal of 1263790923 is 3290973621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1263790923 - 2¹ = 1263790921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1263790921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323611 + ... + 327492.

It is an arithmetic number, because the mean of its divisors is an integer number (210957696).

Almost surely, 2^1263790923 is an apocalyptic number.

1263790923 is a deficient number, since it is larger than the sum of its proper divisors (423870645).

1263790923 is an equidigital number, since it uses as much as digits as its factorization.

1263790923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651753.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 1263790923 is about 35549.8371726229. The cubic root of 1263790923 is about 1081.1644171272.

The spelling of 1263790923 in words is "one billion, two hundred sixty-three million, seven hundred ninety thousand, nine hundred twenty-three".