508923661 has 8 divisors (see below), whose sum is σ = 526875264. Its totient is φ = 491268960.

The previous prime is 508923647. The next prime is 508923677. The reversal of 508923661 is 166329805.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 508923661 - 2¹³ = 508915469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508923601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70735 + ... + 77596.

It is an arithmetic number, because the mean of its divisors is an integer number (65859408).

Almost surely, 2^508923661 is an apocalyptic number.

It is an amenable number.

508923661 is a deficient number, since it is larger than the sum of its proper divisors (17951603).

508923661 is a wasteful number, since it uses less digits than its factorization.

508923661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148451.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 508923661 is about 22559.3364485749. The cubic root of 508923661 is about 798.3945203032.

The spelling of 508923661 in words is "five hundred eight million, nine hundred twenty-three thousand, six hundred sixty-one".