10971487949 has 2 divisors, whose sum is σ = 10971487950. Its totient is φ = 10971487948.

The previous prime is 10971487939. The next prime is 10971487951. The reversal of 10971487949 is 94978417901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9903832324 + 1067655625 = 99518^2 + 32675^2 .

It is a cyclic number.

It is not a de Polignac number, because 10971487949 - 2²⁰ = 10970439373 is a prime.

Together with 10971487951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10971487909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5485743974 + 5485743975.

It is an arithmetic number, because the mean of its divisors is an integer number (5485743975).

Almost surely, 2^10971487949 is an apocalyptic number.

It is an amenable number.

10971487949 is a deficient number, since it is larger than the sum of its proper divisors (1).

10971487949 is an equidigital number, since it uses as much as digits as its factorization.

10971487949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 10971487949 in words is "ten billion, nine hundred seventy-one million, four hundred eighty-seven thousand, nine hundred forty-nine".