1949666977 has 16 divisors (see below), whose sum is σ = 2014689600. Its totient is φ = 1885965120.

The previous prime is 1949666941. The next prime is 1949666987. The reversal of 1949666977 is 7796669491.

It is a cyclic number.

It is not a de Polignac number, because 1949666977 - 2¹¹ = 1949664929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949666987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1008702 + ... + 1010632.

It is an arithmetic number, because the mean of its divisors is an integer number (125918100).

Almost surely, 2^1949666977 is an apocalyptic number.

It is an amenable number.

1949666977 is a deficient number, since it is larger than the sum of its proper divisors (65022623).

1949666977 is a wasteful number, since it uses less digits than its factorization.

1949666977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256.

The product of its digits is 30862944, while the sum is 64.

The square root of 1949666977 is about 44155.0334276852. The cubic root of 1949666977 is about 1249.2618526232.

The spelling of 1949666977 in words is "one billion, nine hundred forty-nine million, six hundred sixty-six thousand, nine hundred seventy-seven".