1947879 has 6 divisors (see below), whose sum is σ = 2813616. Its totient is φ = 1298580.

The previous prime is 1947853. The next prime is 1947919. The reversal of 1947879 is 9787491.

It is not a de Polignac number, because 1947879 - 2¹¹ = 1945831 is a prime.

1947879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947779) 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, 108207 + ... + 108224.

It is an arithmetic number, because the mean of its divisors is an integer number (468936).

2^1947879 is an apocalyptic number.

1947879 is a deficient number, since it is larger than the sum of its proper divisors (865737).

1947879 is a wasteful number, since it uses less digits than its factorization.

1947879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216437 (or 216434 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1947879 is about 1395.6643579314. The cubic root of 1947879 is about 124.8879849844.

The spelling of 1947879 in words is "one million, nine hundred forty-seven thousand, eight hundred seventy-nine".