512383661 has 4 divisors (see below), whose sum is σ = 512435712. Its totient is φ = 512331612.

The previous prime is 512383631. The next prime is 512383681. The reversal of 512383661 is 166383215.

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: 166383215 = 5 ⋅33276643.

It is a cyclic number.

It is not a de Polignac number, because 512383661 - 2¹⁴ = 512367277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512383631) 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, 6251 + ... + 32616.

It is an arithmetic number, because the mean of its divisors is an integer number (128108928).

Almost surely, 2^512383661 is an apocalyptic number.

It is an amenable number.

512383661 is a deficient number, since it is larger than the sum of its proper divisors (52051).

512383661 is a wasteful number, since it uses less digits than its factorization.

512383661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52050.

The product of its digits is 25920, while the sum is 35.

The square root of 512383661 is about 22635.8932008437. The cubic root of 512383661 is about 800.1997735465.

The spelling of 512383661 in words is "five hundred twelve million, three hundred eighty-three thousand, six hundred sixty-one".