2151368789 has 2 divisors, whose sum is σ = 2151368790. Its totient is φ = 2151368788.

The previous prime is 2151368773. The next prime is 2151368827. The reversal of 2151368789 is 9878631512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1331520100 + 819848689 = 36490^2 + 28633^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151368789 - 2⁴ = 2151368773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151368719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075684394 + 1075684395.

It is an arithmetic number, because the mean of its divisors is an integer number (1075684395).

Almost surely, 2^2151368789 is an apocalyptic number.

It is an amenable number.

2151368789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151368789 is an equidigital number, since it uses as much as digits as its factorization.

2151368789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 2151368789 is about 46382.8501603772. The cubic root of 2151368789 is about 1290.9367210426.

The spelling of 2151368789 in words is "two billion, one hundred fifty-one million, three hundred sixty-eight thousand, seven hundred eighty-nine".