47799779 has 2 divisors, whose sum is σ = 47799780. Its totient is φ = 47799778.

The previous prime is 47799769. The next prime is 47799797. The reversal of 47799779 is 97799774.

Together with next prime (47799797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47799779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47799769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23899889 + 23899890.

It is an arithmetic number, because the mean of its divisors is an integer number (23899890).

Almost surely, 2^47799779 is an apocalyptic number.

47799779 is a deficient number, since it is larger than the sum of its proper divisors (1).

47799779 is an equidigital number, since it uses as much as digits as its factorization.

47799779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7001316, while the sum is 59.

The square root of 47799779 is about 6913.7384243259. The cubic root of 47799779 is about 362.9181008586.

The spelling of 47799779 in words is "forty-seven million, seven hundred ninety-nine thousand, seven hundred seventy-nine".