1979975 has 12 divisors (see below), whose sum is σ = 2540760. Its totient is φ = 1528800.

The previous prime is 1979947. The next prime is 1979993. The reversal of 1979975 is 5799791.

It is a happy number.

It is not a de Polignac number, because 1979975 - 2⁶ = 1979911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (211730).

2^1979975 is an apocalyptic number.

1979975 is a deficient number, since it is larger than the sum of its proper divisors (560785).

1979975 is a wasteful number, since it uses less digits than its factorization.

1979975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2765 counting only the distinct ones).

The product of its digits is 178605, while the sum is 47.

The square root of 1979975 is about 1407.1158445558. The cubic root of 1979975 is about 125.5701950659.

The spelling of 1979975 in words is "one million, nine hundred seventy-nine thousand, nine hundred seventy-five".