1947725774 has 12 divisors (see below), whose sum is σ = 2928623544. Its totient is φ = 971523504.

The previous prime is 1947725729. The next prime is 1947725783. The reversal of 1947725774 is 4775277491.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415367 + ... + 420029.

It is an arithmetic number, because the mean of its divisors is an integer number (244051962).

Almost surely, 2^1947725774 is an apocalyptic number.

1947725774 is a deficient number, since it is larger than the sum of its proper divisors (980897770).

1947725774 is an frugal number, since it uses more digits than its factorization.

1947725774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5579 (or 5122 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 53.

The square root of 1947725774 is about 44133.0462805368. The cubic root of 1947725774 is about 1248.8471021081.

The spelling of 1947725774 in words is "one billion, nine hundred forty-seven million, seven hundred twenty-five thousand, seven hundred seventy-four".