1949447677 has 2 divisors, whose sum is σ = 1949447678. Its totient is φ = 1949447676.

The previous prime is 1949447663. The next prime is 1949447693. The reversal of 1949447677 is 7767449491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1832353636 + 117094041 = 42806^2 + 10821^2 .

It is an emirp because it is prime and its reverse (7767449491) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1949447677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1949447627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974723838 + 974723839.

It is an arithmetic number, because the mean of its divisors is an integer number (974723839).

Almost surely, 2^1949447677 is an apocalyptic number.

It is an amenable number.

1949447677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949447677 is an equidigital number, since it uses as much as digits as its factorization.

1949447677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 58.

The square root of 1949447677 is about 44152.5500622557. The cubic root of 1949447677 is about 1249.2150115644.

The spelling of 1949447677 in words is "one billion, nine hundred forty-nine million, four hundred forty-seven thousand, six hundred seventy-seven".