1972879 has 4 divisors (see below), whose sum is σ = 2021040. Its totient is φ = 1924720.

The previous prime is 1972849. The next prime is 1972889. The reversal of 1972879 is 9782791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9782791 = 89 ⋅109919.

It is a cyclic number.

It is not a de Polignac number, because 1972879 - 2⁵ = 1972847 is a prime.

It is a Duffinian number.

1972879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24019 + ... + 24100.

It is an arithmetic number, because the mean of its divisors is an integer number (505260).

2^1972879 is an apocalyptic number.

1972879 is a deficient number, since it is larger than the sum of its proper divisors (48161).

1972879 is an equidigital number, since it uses as much as digits as its factorization.

1972879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48160.

The product of its digits is 63504, while the sum is 43.

The square root of 1972879 is about 1404.5921116111. The cubic root of 1972879 is about 125.4200058468.

The spelling of 1972879 in words is "one million, nine hundred seventy-two thousand, eight hundred seventy-nine".