84779473 has 2 divisors, whose sum is σ = 84779474. Its totient is φ = 84779472.

The previous prime is 84779423. The next prime is 84779477. The reversal of 84779473 is 37497748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70694464 + 14085009 = 8408^2 + 3753^2 .

It is a cyclic number.

It is not a de Polignac number, because 84779473 - 2⁹ = 84778961 is a prime.

It is not a weakly prime, because it can be changed into another prime (84779477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42389736 + 42389737.

It is an arithmetic number, because the mean of its divisors is an integer number (42389737).

Almost surely, 2^84779473 is an apocalyptic number.

It is an amenable number.

84779473 is a deficient number, since it is larger than the sum of its proper divisors (1).

84779473 is an equidigital number, since it uses as much as digits as its factorization.

84779473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 84779473 is about 9207.5769342428. The cubic root of 84779473 is about 439.3023948996.

The spelling of 84779473 in words is "eighty-four million, seven hundred seventy-nine thousand, four hundred seventy-three".