1979549 has 16 divisors (see below), whose sum is σ = 2365440. Its totient is φ = 1632960.

The previous prime is 1979543. The next prime is 1979563. The reversal of 1979549 is 9459791.

It is a cyclic number.

It is not a de Polignac number, because 1979549 - 2²⁰ = 930973 is a prime.

It is a super-2 number, since 2×1979549² = 7837228486802, which contains 22 as substring.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 15524 + ... + 15650.

It is an arithmetic number, because the mean of its divisors is an integer number (147840).

2^1979549 is an apocalyptic number.

It is an amenable number.

1979549 is a deficient number, since it is larger than the sum of its proper divisors (385891).

1979549 is a wasteful number, since it uses less digits than its factorization.

1979549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 102060, while the sum is 44.

The square root of 1979549 is about 1406.9644629485. The cubic root of 1979549 is about 125.5611887670.

The spelling of 1979549 in words is "one million, nine hundred seventy-nine thousand, five hundred forty-nine".