1949375647 has 4 divisors (see below), whose sum is σ = 1950145960. Its totient is φ = 1948605336.

The previous prime is 1949375629. The next prime is 1949375651. The reversal of 1949375647 is 7465739491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1949375647 - 2¹¹ = 1949373599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949375657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381348 + ... + 386425.

It is an arithmetic number, because the mean of its divisors is an integer number (487536490).

Almost surely, 2^1949375647 is an apocalyptic number.

1949375647 is a deficient number, since it is larger than the sum of its proper divisors (770313).

1949375647 is an equidigital number, since it uses as much as digits as its factorization.

1949375647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770312.

The product of its digits is 5715360, while the sum is 55.

The square root of 1949375647 is about 44151.7343600452. The cubic root of 1949375647 is about 1249.1996256568.

The spelling of 1949375647 in words is "one billion, nine hundred forty-nine million, three hundred seventy-five thousand, six hundred forty-seven".