1970819 has 4 divisors (see below), whose sum is σ = 2016696. Its totient is φ = 1924944.

The previous prime is 1970809. The next prime is 1970867. The reversal of 1970819 is 9180791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1970819 - 2¹⁶ = 1905283 is a prime.

It is a super-2 number, since 2×1970819² = 7768255061522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1970809) 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, 22874 + ... + 22959.

It is an arithmetic number, because the mean of its divisors is an integer number (504174).

2^1970819 is an apocalyptic number.

1970819 is a deficient number, since it is larger than the sum of its proper divisors (45877).

1970819 is an equidigital number, since it uses as much as digits as its factorization.

1970819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45876.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1970819 is about 1403.8586111144. The cubic root of 1970819 is about 125.3763378217.

The spelling of 1970819 in words is "one million, nine hundred seventy thousand, eight hundred nineteen".