1972779 has 8 divisors (see below), whose sum is σ = 2744832. Its totient is φ = 1257960.

The previous prime is 1972777. The next prime is 1972781. The reversal of 1972779 is 9772791.

It is an interprime number because it is at equal distance from previous prime (1972777) and next prime (1972781).

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

It is not a de Polignac number, because 1972779 - 2¹ = 1972777 is a prime.

It is a super-3 number, since 3×1972779³ = 23033321180256255417, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1972779.

It is not an unprimeable number, because it can be changed into a prime (1972777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14227 + ... + 14364.

It is an arithmetic number, because the mean of its divisors is an integer number (343104).

2^1972779 is an apocalyptic number.

1972779 is a deficient number, since it is larger than the sum of its proper divisors (772053).

1972779 is a wasteful number, since it uses less digits than its factorization.

1972779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28617.

The product of its digits is 55566, while the sum is 42.

The square root of 1972779 is about 1404.5565136370. The cubic root of 1972779 is about 125.4178867419.

The spelling of 1972779 in words is "one million, nine hundred seventy-two thousand, seven hundred seventy-nine".