1974523505 has 4 divisors (see below), whose sum is σ = 2369428212. Its totient is φ = 1579618800.

The previous prime is 1974523471. The next prime is 1974523511. The reversal of 1974523505 is 5053254791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5053254791 = 13 ⋅388711907.

It can be written as a sum of positive squares in 2 ways, for example, as 1167452224 + 807071281 = 34168^2 + 28409^2 .

It is not a de Polignac number, because 1974523505 - 2⁸ = 1974523249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197452346 + ... + 197452355.

It is an arithmetic number, because the mean of its divisors is an integer number (592357053).

Almost surely, 2^1974523505 is an apocalyptic number.

It is an amenable number.

1974523505 is a deficient number, since it is larger than the sum of its proper divisors (394904707).

1974523505 is an equidigital number, since it uses as much as digits as its factorization.

1974523505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394904706.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 1974523505 is about 44435.6107755930. The cubic root of 1974523505 is about 1254.5484436537.

The spelling of 1974523505 in words is "one billion, nine hundred seventy-four million, five hundred twenty-three thousand, five hundred five".