1970804521 has 4 divisors (see below), whose sum is σ = 2252348032. Its totient is φ = 1689261012.

The previous prime is 1970804513. The next prime is 1970804557. The reversal of 1970804521 is 1254080791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1970804521 - 2³ = 1970804513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1970804221) 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, 140771745 + ... + 140771758.

It is an arithmetic number, because the mean of its divisors is an integer number (563087008).

Almost surely, 2^1970804521 is an apocalyptic number.

It is an amenable number.

1970804521 is a deficient number, since it is larger than the sum of its proper divisors (281543511).

1970804521 is an equidigital number, since it uses as much as digits as its factorization.

1970804521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281543510.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1970804521 is about 44393.7441651411. The cubic root of 1970804521 is about 1253.7603078714.

It can be divided in two parts, 197080 and 4521, that added together give a square (201601 = 449²).

The spelling of 1970804521 in words is "one billion, nine hundred seventy million, eight hundred four thousand, five hundred twenty-one".