7900001 has 2 divisors, whose sum is σ = 7900002. Its totient is φ = 7900000.

The previous prime is 7899989. The next prime is 7900007. The reversal of 7900001 is 1000097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6507601 + 1392400 = 2551^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 7900001 - 2¹⁸ = 7637857 is a prime.

It is not a weakly prime, because it can be changed into another prime (7900007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3950000 + 3950001.

It is an arithmetic number, because the mean of its divisors is an integer number (3950001).

Almost surely, 2^7900001 is an apocalyptic number.

It is an amenable number.

7900001 is a deficient number, since it is larger than the sum of its proper divisors (1).

7900001 is an equidigital number, since it uses as much as digits as its factorization.

7900001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63, while the sum is 17.

The square root of 7900001 is about 2810.6940424031. The cubic root of 7900001 is about 199.1631785325.

Adding to 7900001 its reverse (1000097), we get a palindrome (8900098).

The spelling of 7900001 in words is "seven million, nine hundred thousand, one".