434571661 has 4 divisors (see below), whose sum is σ = 434614752. Its totient is φ = 434528572.

The previous prime is 434571607. The next prime is 434571691. The reversal of 434571661 is 166175434.

It is the 8511-st star number.

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: 166175434 = 2 ⋅83087717.

It is a cyclic number.

It is not a de Polignac number, because 434571661 - 2⁹ = 434571149 is a prime.

It is a super-3 number, since 3×434571661³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 434571661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434571601) 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, 2610 + ... + 29596.

It is an arithmetic number, because the mean of its divisors is an integer number (108653688).

Almost surely, 2^434571661 is an apocalyptic number.

It is an amenable number.

434571661 is a deficient number, since it is larger than the sum of its proper divisors (43091).

434571661 is a wasteful number, since it uses less digits than its factorization.

434571661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43090.

The product of its digits is 60480, while the sum is 37.

The square root of 434571661 is about 20846.3824439637. The cubic root of 434571661 is about 757.4497047866.

The spelling of 434571661 in words is "four hundred thirty-four million, five hundred seventy-one thousand, six hundred sixty-one".