8424779477 has 2 divisors, whose sum is σ = 8424779478. Its totient is φ = 8424779476.

The previous prime is 8424779443. The next prime is 8424779497. The reversal of 8424779477 is 7749774248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8095320676 + 329458801 = 89974^2 + 18151^2 .

It is a cyclic number.

It is not a de Polignac number, because 8424779477 - 2⁶ = 8424779413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8424779497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212389738 + 4212389739.

It is an arithmetic number, because the mean of its divisors is an integer number (4212389739).

Almost surely, 2^8424779477 is an apocalyptic number.

It is an amenable number.

8424779477 is a deficient number, since it is larger than the sum of its proper divisors (1).

8424779477 is an equidigital number, since it uses as much as digits as its factorization.

8424779477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22127616, while the sum is 59.

The square root of 8424779477 is about 91786.5974802422. The cubic root of 8424779477 is about 2034.7896219765.

The spelling of 8424779477 in words is "eight billion, four hundred twenty-four million, seven hundred seventy-nine thousand, four hundred seventy-seven".