8120997 has 6 divisors (see below), whose sum is σ = 11730342. Its totient is φ = 5413992.

The previous prime is 8120953. The next prime is 8121011. The reversal of 8120997 is 7990218.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6548481 + 1572516 = 2559^2 + 1254^2 .

It is not a de Polignac number, because 8120997 - 2⁶ = 8120933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8120597) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 451158 + ... + 451175.

It is an arithmetic number, because the mean of its divisors is an integer number (1955057).

Almost surely, 2^8120997 is an apocalyptic number.

It is an amenable number.

8120997 is a deficient number, since it is larger than the sum of its proper divisors (3609345).

8120997 is a wasteful number, since it uses less digits than its factorization.

8120997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902339 (or 902336 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 8120997 is about 2849.7363035902. The cubic root of 8120997 is about 201.0032671928.

The spelling of 8120997 in words is "eight million, one hundred twenty thousand, nine hundred ninety-seven".