1941247649 has 6 divisors (see below), whose sum is σ = 2133768210. Its totient is φ = 1764770480.

The previous prime is 1941247631. The next prime is 1941247669. The reversal of 1941247649 is 9467421491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1361979025 + 579268624 = 36905^2 + 24068^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1941247649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1941247669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8021564 + ... + 8021805.

It is an arithmetic number, because the mean of its divisors is an integer number (355628035).

Almost surely, 2^1941247649 is an apocalyptic number.

It is an amenable number.

1941247649 is a deficient number, since it is larger than the sum of its proper divisors (192520561).

1941247649 is a wasteful number, since it uses less digits than its factorization.

1941247649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16043391 (or 16043380 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 1941247649 is about 44059.5920203535. The cubic root of 1941247649 is about 1247.4610114414.

The spelling of 1941247649 in words is "one billion, nine hundred forty-one million, two hundred forty-seven thousand, six hundred forty-nine".