1979738 has 4 divisors (see below), whose sum is σ = 2969610. Its totient is φ = 989868.

The previous prime is 1979729. The next prime is 1979741. The reversal of 1979738 is 8379791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8379791 = 7 ⋅1197113.

It can be written as a sum of positive squares in only one way, i.e., 1471369 + 508369 = 1213^2 + 713^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494933 + ... + 494936.

2^1979738 is an apocalyptic number.

1979738 is a deficient number, since it is larger than the sum of its proper divisors (989872).

1979738 is an equidigital number, since it uses as much as digits as its factorization.

1979738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989871.

The product of its digits is 95256, while the sum is 44.

The square root of 1979738 is about 1407.0316272209. The cubic root of 1979738 is about 125.5651846787.

The spelling of 1979738 in words is "one million, nine hundred seventy-nine thousand, seven hundred thirty-eight".