47937661 has 2 divisors, whose sum is σ = 47937662. Its totient is φ = 47937660.

The previous prime is 47937649. The next prime is 47937751. The reversal of 47937661 is 16673974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 8323225 = 6294^2 + 2885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47937661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47937601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23968830 + 23968831.

It is an arithmetic number, because the mean of its divisors is an integer number (23968831).

Almost surely, 2^47937661 is an apocalyptic number.

It is an amenable number.

47937661 is a deficient number, since it is larger than the sum of its proper divisors (1).

47937661 is an equidigital number, since it uses as much as digits as its factorization.

47937661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 47937661 is about 6923.7028387995. The cubic root of 47937661 is about 363.2667205734.

The spelling of 47937661 in words is "forty-seven million, nine hundred thirty-seven thousand, six hundred sixty-one".