1979747 has 12 divisors (see below), whose sum is σ = 2513016. Its totient is φ = 1542240.

The previous prime is 1979741. The next prime is 1979749. The reversal of 1979747 is 7479791.

It is a happy number.

It is not a de Polignac number, because 1979747 - 2⁶ = 1979683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1979698 and 1979707.

It is not an unprimeable number, because it can be changed into a prime (1979741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1298 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (209418).

2^1979747 is an apocalyptic number.

1979747 is a deficient number, since it is larger than the sum of its proper divisors (533269).

1979747 is a wasteful number, since it uses less digits than its factorization.

1979747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698 (or 3691 counting only the distinct ones).

The product of its digits is 111132, while the sum is 44.

The square root of 1979747 is about 1407.0348254397. The cubic root of 1979747 is about 125.5653749539.

Adding to 1979747 its sum of digits (44), we get a palindrome (1979791).

The spelling of 1979747 in words is "one million, nine hundred seventy-nine thousand, seven hundred forty-seven".