47957779 has 4 divisors (see below), whose sum is σ = 47971984. Its totient is φ = 47943576.

The previous prime is 47957761. The next prime is 47957807. The reversal of 47957779 is 97775974.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 47957779 - 2²¹ = 45860627 is a prime.

It is a super-2 number, since 2×47957779² = 4599897133225682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47957759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189 + ... + 9865.

It is an arithmetic number, because the mean of its divisors is an integer number (11992996).

Almost surely, 2^47957779 is an apocalyptic number.

47957779 is a deficient number, since it is larger than the sum of its proper divisors (14205).

47957779 is an equidigital number, since it uses as much as digits as its factorization.

47957779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14204.

The product of its digits is 3889620, while the sum is 55.

The square root of 47957779 is about 6925.1555217193. The cubic root of 47957779 is about 363.3175308523.

The spelling of 47957779 in words is "forty-seven million, nine hundred fifty-seven thousand, seven hundred seventy-nine".