123800533609 has 9 divisors (see below), whose sum is σ = 124292609469. Its totient is φ = 123310402380.

The previous prime is 123800533601. The next prime is 123800533639. The reversal of 123800533609 is 906335008321.

The square root of 123800533609 is 351853.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 123800533609 - 2³ = 123800533601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123800533601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 116462812 + ... + 116463874.

It is an arithmetic number, because the mean of its divisors is an integer number (13810289941).

Almost surely, 2^123800533609 is an apocalyptic number.

123800533609 is the 351853-rd square number.

123800533609 is the 175927-th centered octagonal number.

It is an amenable number.

123800533609 is a deficient number, since it is larger than the sum of its proper divisors (492075860).

123800533609 is an frugal number, since it uses more digits than its factorization.

123800533609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 123800533609 in words is "one hundred twenty-three billion, eight hundred million, five hundred thirty-three thousand, six hundred nine".