123738553 has 2 divisors, whose sum is σ = 123738554. Its totient is φ = 123738552.

The previous prime is 123738523. The next prime is 123738557. The reversal of 123738553 is 355837321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123721129 + 17424 = 11123^2 + 132^2 .

It is a cyclic number.

It is not a de Polignac number, because 123738553 - 2⁵ = 123738521 is a prime.

It is a super-2 number, since 2×123738553² = 30622458997067618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123738557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61869276 + 61869277.

It is an arithmetic number, because the mean of its divisors is an integer number (61869277).

Almost surely, 2^123738553 is an apocalyptic number.

It is an amenable number.

123738553 is a deficient number, since it is larger than the sum of its proper divisors (1).

123738553 is an equidigital number, since it uses as much as digits as its factorization.

123738553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 37.

The square root of 123738553 is about 11123.7832143565. The cubic root of 123738553 is about 498.3123809592.

The spelling of 123738553 in words is "one hundred twenty-three million, seven hundred thirty-eight thousand, five hundred fifty-three".