1273722993 has 12 divisors (see below), whose sum is σ = 1849357380. Its totient is φ = 844747776.

The previous prime is 1273722991. The next prime is 1273723013. The reversal of 1273722993 is 3992273721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 522031104 + 751691889 = 22848^2 + 27417^2 .

It is not a de Polignac number, because 1273722993 - 2¹ = 1273722991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1273722991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364908 + ... + 368381.

It is an arithmetic number, because the mean of its divisors is an integer number (154113115).

Almost surely, 2^1273722993 is an apocalyptic number.

It is an amenable number.

1273722993 is a deficient number, since it is larger than the sum of its proper divisors (575634387).

1273722993 is a wasteful number, since it uses less digits than its factorization.

1273722993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733488 (or 733485 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 1273722993 is about 35689.2559883223. The cubic root of 1273722993 is about 1083.9893022482.

The spelling of 1273722993 in words is "one billion, two hundred seventy-three million, seven hundred twenty-two thousand, nine hundred ninety-three".