472139779 has 2 divisors, whose sum is σ = 472139780. Its totient is φ = 472139778.

The previous prime is 472139777. The next prime is 472139849. The reversal of 472139779 is 977931274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 472139779 - 2¹ = 472139777 is a prime.

Together with 472139777, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (472139777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236069889 + 236069890.

It is an arithmetic number, because the mean of its divisors is an integer number (236069890).

Almost surely, 2^472139779 is an apocalyptic number.

472139779 is a deficient number, since it is larger than the sum of its proper divisors (1).

472139779 is an equidigital number, since it uses as much as digits as its factorization.

472139779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 49.

The square root of 472139779 is about 21728.7776692570. Note that the first 3 decimals coincide. The cubic root of 472139779 is about 778.6761342253.

The spelling of 472139779 in words is "four hundred seventy-two million, one hundred thirty-nine thousand, seven hundred seventy-nine".