2734878121 has 2 divisors, whose sum is σ = 2734878122. Its totient is φ = 2734878120.

The previous prime is 2734878079. The next prime is 2734878143. The reversal of 2734878121 is 1218784372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1758628096 + 976250025 = 41936^2 + 31245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2734878121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2734878191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1367439060 + 1367439061.

It is an arithmetic number, because the mean of its divisors is an integer number (1367439061).

Almost surely, 2^2734878121 is an apocalyptic number.

It is an amenable number.

2734878121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2734878121 is an equidigital number, since it uses as much as digits as its factorization.

2734878121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 2734878121 is about 52296.0621940123. The cubic root of 2734878121 is about 1398.4469378124.

The spelling of 2734878121 in words is "two billion, seven hundred thirty-four million, eight hundred seventy-eight thousand, one hundred twenty-one".