47991707 has 2 divisors, whose sum is σ = 47991708. Its totient is φ = 47991706.

The previous prime is 47991703. The next prime is 47991763. The reversal of 47991707 is 70719974.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47991707 - 2² = 47991703 is a prime.

It is not a weakly prime, because it can be changed into another prime (47991703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23995853 + 23995854.

It is an arithmetic number, because the mean of its divisors is an integer number (23995854).

Almost surely, 2^47991707 is an apocalyptic number.

47991707 is a deficient number, since it is larger than the sum of its proper divisors (1).

47991707 is an equidigital number, since it uses as much as digits as its factorization.

47991707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 47991707 is about 6927.6047086998. The cubic root of 47991707 is about 363.4031876650.

The spelling of 47991707 in words is "forty-seven million, nine hundred ninety-one thousand, seven hundred seven".