1047643779 has 32 divisors (see below), whose sum is σ = 1721273344. Its totient is φ = 551940480.

The previous prime is 1047643777. The next prime is 1047643783. The reversal of 1047643779 is 9773467401.

It is a Wieferich number.

It is not a de Polignac number, because 1047643779 - 2¹ = 1047643777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1047643777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296634 + ... + 300144.

It is an arithmetic number, because the mean of its divisors is an integer number (53789792).

Almost surely, 2^1047643779 is an apocalyptic number.

1047643779 is a deficient number, since it is larger than the sum of its proper divisors (673629565).

1047643779 is a wasteful number, since it uses less digits than its factorization.

1047643779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627.

The product of its (nonzero) digits is 889056, while the sum is 48.

The square root of 1047643779 is about 32367.3257931513. The cubic root of 1047643779 is about 1015.6355161660.

The spelling of 1047643779 in words is "one billion, forty-seven million, six hundred forty-three thousand, seven hundred seventy-nine".