1979653 has 8 divisors (see below), whose sum is σ = 2145528. Its totient is φ = 1815744.

The previous prime is 1979617. The next prime is 1979683. The reversal of 1979653 is 3569791.

It can be written as a sum of positive squares in 4 ways, for example, as 124609 + 1855044 = 353^2 + 1362^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1979653 - 2⁹ = 1979141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979683) 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, 2175 + ... + 2947.

It is an arithmetic number, because the mean of its divisors is an integer number (268191).

2^1979653 is an apocalyptic number.

1979653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1979653 is a deficient number, since it is larger than the sum of its proper divisors (165875).

1979653 is a wasteful number, since it uses less digits than its factorization.

1979653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its digits is 51030, while the sum is 40.

The square root of 1979653 is about 1407.0014214634. The cubic root of 1979653 is about 125.5633876070.

It can be divided in two parts, 197 and 9653, that multiplied together give a square (1901641 = 1379²).

The spelling of 1979653 in words is "one million, nine hundred seventy-nine thousand, six hundred fifty-three".