1979553 has 8 divisors (see below), whose sum is σ = 2778400. Its totient is φ = 1250208.

The previous prime is 1979543. The next prime is 1979563. The reversal of 1979553 is 3559791.

It is an interprime number because it is at equal distance from previous prime (1979543) and next prime (1979563).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1979553 - 2⁶ = 1979489 is a prime.

It is a d-powerful number, because it can be written as 1 + 9 + 7² + 9⁴ + 5³ + 5⁹ + 3⁹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17308 + ... + 17421.

It is an arithmetic number, because the mean of its divisors is an integer number (347300).

2^1979553 is an apocalyptic number.

It is an amenable number.

1979553 is a deficient number, since it is larger than the sum of its proper divisors (798847).

1979553 is a wasteful number, since it uses less digits than its factorization.

1979553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34751.

The product of its digits is 42525, while the sum is 39.

The square root of 1979553 is about 1406.9658844478. The cubic root of 1979553 is about 125.5612733392.

The spelling of 1979553 in words is "one million, nine hundred seventy-nine thousand, five hundred fifty-three".