1263722673 has 8 divisors (see below), whose sum is σ = 1695696448. Its totient is φ = 837115344.

The previous prime is 1263722653. The next prime is 1263722683. The reversal of 1263722673 is 3762273621.

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

It is not a de Polignac number, because 1263722673 - 2⁵ = 1263722641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263722653) 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, 1341061 + ... + 1342002.

It is an arithmetic number, because the mean of its divisors is an integer number (211962056).

Almost surely, 2^1263722673 is an apocalyptic number.

It is an amenable number.

1263722673 is a deficient number, since it is larger than the sum of its proper divisors (431973775).

1263722673 is a wasteful number, since it uses less digits than its factorization.

1263722673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683223.

The product of its digits is 127008, while the sum is 39.

The square root of 1263722673 is about 35548.8772396541. The cubic root of 1263722673 is about 1081.1449543087.

The spelling of 1263722673 in words is "one billion, two hundred sixty-three million, seven hundred twenty-two thousand, six hundred seventy-three".