7972551993 has 32 divisors (see below), whose sum is σ = 12330649600. Its totient is φ = 4487654016.

The previous prime is 7972551991. The next prime is 7972551997. The reversal of 7972551993 is 3991552797.

It is not a de Polignac number, because 7972551993 - 2¹ = 7972551991 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7972551991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1405998 + ... + 1411656.

It is an arithmetic number, because the mean of its divisors is an integer number (385332800).

Almost surely, 2^7972551993 is an apocalyptic number.

7972551993 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

7972551993 is a deficient number, since it is larger than the sum of its proper divisors (4358097607).

7972551993 is a wasteful number, since it uses less digits than its factorization.

7972551993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6661.

The product of its digits is 5358150, while the sum is 57.

The square root of 7972551993 is about 89289.1482376218. The cubic root of 7972551993 is about 1997.7100451374.

The spelling of 7972551993 in words is "seven billion, nine hundred seventy-two million, five hundred fifty-one thousand, nine hundred ninety-three".