1979930 has 16 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 785232.

The previous prime is 1979911. The next prime is 1979941. The reversal of 1979930 is 399791.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491 + ... + 2049.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

2^1979930 is an apocalyptic number.

1979930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1979930 is a deficient number, since it is larger than the sum of its proper divisors (1614310).

1979930 is a wasteful number, since it uses less digits than its factorization.

1979930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 1979930 is about 1407.0998543103. The cubic root of 1979930 is about 125.5692437573.

The spelling of 1979930 in words is "one million, nine hundred seventy-nine thousand, nine hundred thirty".