1949547911 has 2 divisors, whose sum is σ = 1949547912. Its totient is φ = 1949547910.

The previous prime is 1949547851. The next prime is 1949547979. The reversal of 1949547911 is 1197459491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1949547911 - 2²² = 1945353607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1949547911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1949747911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974773955 + 974773956.

It is an arithmetic number, because the mean of its divisors is an integer number (974773956).

Almost surely, 2^1949547911 is an apocalyptic number.

1949547911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949547911 is an equidigital number, since it uses as much as digits as its factorization.

1949547911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 50.

The square root of 1949547911 is about 44153.6851349918. The cubic root of 1949547911 is about 1249.2364213331.

The spelling of 1949547911 in words is "one billion, nine hundred forty-nine million, five hundred forty-seven thousand, nine hundred eleven".