1047421777 has 2 divisors, whose sum is σ = 1047421778. Its totient is φ = 1047421776.

The previous prime is 1047421751. The next prime is 1047421783. The reversal of 1047421777 is 7771247401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1034201281 + 13220496 = 32159^2 + 3636^2 .

It is an emirp because it is prime and its reverse (7771247401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1047421777 - 2¹⁵ = 1047389009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1047421877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523710888 + 523710889.

It is an arithmetic number, because the mean of its divisors is an integer number (523710889).

Almost surely, 2^1047421777 is an apocalyptic number.

It is an amenable number.

1047421777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047421777 is an equidigital number, since it uses as much as digits as its factorization.

1047421777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76832, while the sum is 40.

The square root of 1047421777 is about 32363.8961962246. The cubic root of 1047421777 is about 1015.5637713456.

The spelling of 1047421777 in words is "one billion, forty-seven million, four hundred twenty-one thousand, seven hundred seventy-seven".