1272207993 has 32 divisors (see below), whose sum is σ = 2053134336. Its totient is φ = 684972288.

The previous prime is 1272207961. The next prime is 1272208001. The reversal of 1272207993 is 3997022721.

It is not a de Polignac number, because 1272207993 - 2⁵ = 1272207961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1272207193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12705 + ... + 52017.

It is an arithmetic number, because the mean of its divisors is an integer number (64160448).

Almost surely, 2^1272207993 is an apocalyptic number.

It is an amenable number.

1272207993 is a deficient number, since it is larger than the sum of its proper divisors (780926343).

1272207993 is a wasteful number, since it uses less digits than its factorization.

1272207993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39413.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 1272207993 is about 35668.0247981298. The cubic root of 1272207993 is about 1083.5593565060.

The spelling of 1272207993 in words is "one billion, two hundred seventy-two million, two hundred seven thousand, nine hundred ninety-three".