1949967657 has 12 divisors (see below), whose sum is σ = 3072676464. Its totient is φ = 1181798520.

The previous prime is 1949967653. The next prime is 1949967659. The reversal of 1949967657 is 7567699491.

It is not a de Polignac number, because 1949967657 - 2² = 1949967653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1949967594 and 1949967603.

It is not an unprimeable number, because it can be changed into a prime (1949967653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9848223 + ... + 9848420.

It is an arithmetic number, because the mean of its divisors is an integer number (256056372).

Almost surely, 2^1949967657 is an apocalyptic number.

It is an amenable number.

1949967657 is a deficient number, since it is larger than the sum of its proper divisors (1122708807).

1949967657 is a wasteful number, since it uses less digits than its factorization.

1949967657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19696660 (or 19696657 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 63.

The square root of 1949967657 is about 44158.4381177596. The cubic root of 1949967657 is about 1249.3260702135.

The spelling of 1949967657 in words is "one billion, nine hundred forty-nine million, nine hundred sixty-seven thousand, six hundred fifty-seven".