7894417 has 2 divisors, whose sum is σ = 7894418. Its totient is φ = 7894416.

The previous prime is 7894387. The next prime is 7894433. The reversal of 7894417 is 7144987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7203856 + 690561 = 2684^2 + 831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7894417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7894417.

It is not a weakly prime, because it can be changed into another prime (7894457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3947208 + 3947209.

It is an arithmetic number, because the mean of its divisors is an integer number (3947209).

Almost surely, 2^7894417 is an apocalyptic number.

It is an amenable number.

7894417 is a deficient number, since it is larger than the sum of its proper divisors (1).

7894417 is an equidigital number, since it uses as much as digits as its factorization.

7894417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 7894417 is about 2809.7005178488. The cubic root of 7894417 is about 199.1162422801.

It can be divided in two parts, 78944 and 17, that added together give a square (78961 = 281²).

The spelling of 7894417 in words is "seven million, eight hundred ninety-four thousand, four hundred seventeen".