7987901 has 2 divisors, whose sum is σ = 7987902. Its totient is φ = 7987900.

The previous prime is 7987897. The next prime is 7987921. The reversal of 7987901 is 1097897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6895876 + 1092025 = 2626^2 + 1045^2 .

It is an emirp because it is prime and its reverse (1097897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7987901 - 2² = 7987897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7987921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993950 + 3993951.

It is an arithmetic number, because the mean of its divisors is an integer number (3993951).

Almost surely, 2^7987901 is an apocalyptic number.

It is an amenable number.

7987901 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987901 is an equidigital number, since it uses as much as digits as its factorization.

7987901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 7987901 is about 2826.2874942228. The cubic root of 7987901 is about 199.8991241288.

It can be divided in two parts, 7987 and 901, that added together give a palindrome (8888).

The spelling of 7987901 in words is "seven million, nine hundred eighty-seven thousand, nine hundred one".