2547347989 has 2 divisors, whose sum is σ = 2547347990. Its totient is φ = 2547347988.

The previous prime is 2547347977. The next prime is 2547348053. The reversal of 2547347989 is 9897437452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2484224964 + 63123025 = 49842^2 + 7945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2547347989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2547347939) 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, 1273673994 + 1273673995.

It is an arithmetic number, because the mean of its divisors is an integer number (1273673995).

Almost surely, 2^2547347989 is an apocalyptic number.

It is an amenable number.

2547347989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2547347989 is an equidigital number, since it uses as much as digits as its factorization.

2547347989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 58.

The square root of 2547347989 is about 50471.2590391799. The cubic root of 2547347989 is about 1365.7234267678.

The spelling of 2547347989 in words is "two billion, five hundred forty-seven million, three hundred forty-seven thousand, nine hundred eighty-nine".