2147856769 has 2 divisors, whose sum is σ = 2147856770. Its totient is φ = 2147856768.

The previous prime is 2147856727. The next prime is 2147856803. The reversal of 2147856769 is 9676587412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1467273025 + 680583744 = 38305^2 + 26088^2 .

It is a cyclic number.

It is not a de Polignac number, because 2147856769 - 2⁹ = 2147856257 is a prime.

It is a super-2 number, since 2×2147856769² = 9226577400278238722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2147856719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073928384 + 1073928385.

It is an arithmetic number, because the mean of its divisors is an integer number (1073928385).

Almost surely, 2^2147856769 is an apocalyptic number.

It is an amenable number.

2147856769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2147856769 is an equidigital number, since it uses as much as digits as its factorization.

2147856769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 55.

The square root of 2147856769 is about 46344.9756607984. The cubic root of 2147856769 is about 1290.2338716251.

The spelling of 2147856769 in words is "two billion, one hundred forty-seven million, eight hundred fifty-six thousand, seven hundred sixty-nine".