2742248749 has 2 divisors, whose sum is σ = 2742248750. Its totient is φ = 2742248748.

The previous prime is 2742248683. The next prime is 2742248783. The reversal of 2742248749 is 9478422472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2209470025 + 532778724 = 47005^2 + 23082^2 .

It is a cyclic number.

It is not a de Polignac number, because 2742248749 - 2²³ = 2733860141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2742258749) 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, 1371124374 + 1371124375.

It is an arithmetic number, because the mean of its divisors is an integer number (1371124375).

Almost surely, 2^2742248749 is an apocalyptic number.

It is an amenable number.

2742248749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2742248749 is an equidigital number, since it uses as much as digits as its factorization.

2742248749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 49.

The square root of 2742248749 is about 52366.4849784669. The cubic root of 2742248749 is about 1399.7021048150.

The spelling of 2742248749 in words is "two billion, seven hundred forty-two million, two hundred forty-eight thousand, seven hundred forty-nine".