8407972997 has 2 divisors, whose sum is σ = 8407972998. Its totient is φ = 8407972996.

The previous prime is 8407972973. The next prime is 8407973059. The reversal of 8407972997 is 7992797048.

It is an a-pointer prime, because the next prime (8407973059) can be obtained adding 8407972997 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5257845121 + 3150127876 = 72511^2 + 56126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8407972997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8407972597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4203986498 + 4203986499.

It is an arithmetic number, because the mean of its divisors is an integer number (4203986499).

Almost surely, 2^8407972997 is an apocalyptic number.

It is an amenable number.

8407972997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8407972997 is an equidigital number, since it uses as much as digits as its factorization.

8407972997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16003008, while the sum is 62.

The square root of 8407972997 is about 91694.9998473199. Note that the first 3 decimals coincide. The cubic root of 8407972997 is about 2033.4356630366.

The spelling of 8407972997 in words is "eight billion, four hundred seven million, nine hundred seventy-two thousand, nine hundred ninety-seven".