47712779 has 2 divisors, whose sum is σ = 47712780. Its totient is φ = 47712778.

The previous prime is 47712737. The next prime is 47712803. The reversal of 47712779 is 97721774.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47712779 is a prime.

It is not a weakly prime, because it can be changed into another prime (47712079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23856389 + 23856390.

It is an arithmetic number, because the mean of its divisors is an integer number (23856390).

Almost surely, 2^47712779 is an apocalyptic number.

47712779 is a deficient number, since it is larger than the sum of its proper divisors (1).

47712779 is an equidigital number, since it uses as much as digits as its factorization.

47712779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172872, while the sum is 44.

The square root of 47712779 is about 6907.4437384607. The cubic root of 47712779 is about 362.6977856841.

The spelling of 47712779 in words is "forty-seven million, seven hundred twelve thousand, seven hundred seventy-nine".