2947909478 has 4 divisors (see below), whose sum is σ = 4421864220. Its totient is φ = 1473954738.

The previous prime is 2947909439. The next prime is 2947909487. The reversal of 2947909478 is 8749097492.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 736977368 + ... + 736977371.

It is an arithmetic number, because the mean of its divisors is an integer number (1105466055).

Almost surely, 2^2947909478 is an apocalyptic number.

2947909478 is a deficient number, since it is larger than the sum of its proper divisors (1473954742).

2947909478 is a wasteful number, since it uses less digits than its factorization.

2947909478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473954741.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The square root of 2947909478 is about 54294.6542304120. The cubic root of 2947909478 is about 1433.8532811434.

The spelling of 2947909478 in words is "two billion, nine hundred forty-seven million, nine hundred nine thousand, four hundred seventy-eight".