123530457961 has 3 divisors (see below), whose sum is σ = 123530809431. Its totient is φ = 123530106492.

The previous prime is 123530457949. The next prime is 123530457977. The reversal of 123530457961 is 169754035321.

The square root of 123530457961 is 351469.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 89001385561 + 34529072400 = 298331^2 + 185820^2 .

It is not a de Polignac number, because 123530457961 - 2¹⁹ = 123529933673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123530457901) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 175735 + ... + 527203.

It is an arithmetic number, because the mean of its divisors is an integer number (41176936477).

Almost surely, 2^123530457961 is an apocalyptic number.

123530457961 is the 351469-th square number.

123530457961 is the 175735-th centered octagonal number.

It is an amenable number.

123530457961 is a deficient number, since it is larger than the sum of its proper divisors (351470).

123530457961 is an frugal number, since it uses more digits than its factorization.

123530457961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702938 (or 351469 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 123530457961 in words is "one hundred twenty-three billion, five hundred thirty million, four hundred fifty-seven thousand, nine hundred sixty-one".