7890797 has 2 divisors, whose sum is σ = 7890798. Its totient is φ = 7890796.

The previous prime is 7890787. The next prime is 7890811. The reversal of 7890797 is 7970987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7873636 + 17161 = 2806^2 + 131^2 .

It is an emirp because it is prime and its reverse (7970987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7890797 - 2⁶ = 7890733 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7890787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3945398 + 3945399.

It is an arithmetic number, because the mean of its divisors is an integer number (3945399).

Almost surely, 2^7890797 is an apocalyptic number.

It is an amenable number.

7890797 is a deficient number, since it is larger than the sum of its proper divisors (1).

7890797 is an equidigital number, since it uses as much as digits as its factorization.

7890797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 7890797 is about 2809.0562472119. The cubic root of 7890797 is about 199.0858025825.

The spelling of 7890797 in words is "seven million, eight hundred ninety thousand, seven hundred ninety-seven".