1947066164 has 6 divisors (see below), whose sum is σ = 3407365794. Its totient is φ = 973533080.

The previous prime is 1947066113. The next prime is 1947066169. The reversal of 1947066164 is 4616607491.

It can be written as a sum of positive squares in only one way, i.e., 1595203600 + 351862564 = 39940^2 + 18758^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947066169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243383267 + ... + 243383274.

It is an arithmetic number, because the mean of its divisors is an integer number (567894299).

Almost surely, 2^1947066164 is an apocalyptic number.

It is an amenable number.

1947066164 is a deficient number, since it is larger than the sum of its proper divisors (1460299630).

1947066164 is a wasteful number, since it uses less digits than its factorization.

1947066164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486766545 (or 486766543 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1947066164 is about 44125.5726761704. The cubic root of 1947066164 is about 1248.7061094599.

The spelling of 1947066164 in words is "one billion, nine hundred forty-seven million, sixty-six thousand, one hundred sixty-four".