7216997 has 2 divisors, whose sum is σ = 7216998. Its totient is φ = 7216996.

The previous prime is 7216987. The next prime is 7217033. The reversal of 7216997 is 7996127.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7214596 + 2401 = 2686^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 7216997 - 2⁴ = 7216981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7216927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608498 + 3608499.

It is an arithmetic number, because the mean of its divisors is an integer number (3608499).

Almost surely, 2^7216997 is an apocalyptic number.

It is an amenable number.

7216997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7216997 is an equidigital number, since it uses as much as digits as its factorization.

7216997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 7216997 is about 2686.4469099537. The cubic root of 7216997 is about 193.2497058716.

The spelling of 7216997 in words is "seven million, two hundred sixteen thousand, nine hundred ninety-seven".