505890969 has 8 divisors (see below), whose sum is σ = 675721632. Its totient is φ = 336660480.

The previous prime is 505890967. The next prime is 505891013. The reversal of 505890969 is 969098505.

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

It is not a de Polignac number, because 505890969 - 2¹ = 505890967 is a prime.

It is a super-2 number, since 2×505890969² = 511851345031517922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (505890961) 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, 148072 + ... + 151449.

It is an arithmetic number, because the mean of its divisors is an integer number (84465204).

Almost surely, 2^505890969 is an apocalyptic number.

It is an amenable number.

505890969 is a deficient number, since it is larger than the sum of its proper divisors (169830663).

505890969 is a wasteful number, since it uses less digits than its factorization.

505890969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300087.

The product of its (nonzero) digits is 874800, while the sum is 51.

The square root of 505890969 is about 22492.0201182553. The cubic root of 505890969 is about 796.8054737526.

The spelling of 505890969 in words is "five hundred five million, eight hundred ninety thousand, nine hundred sixty-nine".