7387661 has 2 divisors, whose sum is σ = 7387662. Its totient is φ = 7387660.

The previous prime is 7387657. The next prime is 7387691. The reversal of 7387661 is 1667837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6375625 + 1012036 = 2525^2 + 1006^2 .

It is an emirp because it is prime and its reverse (1667837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7387661 - 2² = 7387657 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7387631) 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, 3693830 + 3693831.

It is an arithmetic number, because the mean of its divisors is an integer number (3693831).

Almost surely, 2^7387661 is an apocalyptic number.

It is an amenable number.

7387661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7387661 is an equidigital number, since it uses as much as digits as its factorization.

7387661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 7387661 is about 2718.0252022378. The cubic root of 7387661 is about 194.7611451977.

It can be divided in two parts, 73876 and 61, that added together give a palindrome (73937).

The spelling of 7387661 in words is "seven million, three hundred eighty-seven thousand, six hundred sixty-one".