1913434573 has 4 divisors (see below), whose sum is σ = 1913537440. Its totient is φ = 1913331708.

The previous prime is 1913434543. The next prime is 1913434591. The reversal of 1913434573 is 3754343191.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3754343191 = 67 ⋅56034973.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1913434573 is a prime.

It is a super-2 number, since 2×1913434573² = 7322463730303384658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913434543) 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, 14865 + ... + 63622.

It is an arithmetic number, because the mean of its divisors is an integer number (478384360).

Almost surely, 2^1913434573 is an apocalyptic number.

It is an amenable number.

1913434573 is a deficient number, since it is larger than the sum of its proper divisors (102867).

1913434573 is an equidigital number, since it uses as much as digits as its factorization.

1913434573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102866.

The product of its digits is 136080, while the sum is 40.

The square root of 1913434573 is about 43742.8231027674. The cubic root of 1913434573 is about 1241.4746964531.

The spelling of 1913434573 in words is "one billion, nine hundred thirteen million, four hundred thirty-four thousand, five hundred seventy-three".