123542893 has 4 divisors (see below), whose sum is σ = 130810140. Its totient is φ = 116275648.

The previous prime is 123542869. The next prime is 123542917. The reversal of 123542893 is 398245321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123542869) and next prime (123542917).

It can be written as a sum of positive squares in 2 ways, for example, as 38663524 + 84879369 = 6218^2 + 9213^2 .

It is not a de Polignac number, because 123542893 - 2⁹ = 123542381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123542803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3633598 + ... + 3633631.

It is an arithmetic number, because the mean of its divisors is an integer number (32702535).

Almost surely, 2^123542893 is an apocalyptic number.

It is an amenable number.

123542893 is a deficient number, since it is larger than the sum of its proper divisors (7267247).

123542893 is an equidigital number, since it uses as much as digits as its factorization.

123542893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267246.

The product of its digits is 51840, while the sum is 37.

The square root of 123542893 is about 11114.9850652171. The cubic root of 123542893 is about 498.0495923796.

The spelling of 123542893 in words is "one hundred twenty-three million, five hundred forty-two thousand, eight hundred ninety-three".