123537342493 has 2 divisors, whose sum is σ = 123537342494. Its totient is φ = 123537342492.

The previous prime is 123537342463. The next prime is 123537342503. The reversal of 123537342493 is 394243735321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123536784484 + 558009 = 351478^2 + 747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123537342493 is a prime.

It is a super-2 number, since 2×123537342493² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123537342443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61768671246 + 61768671247.

It is an arithmetic number, because the mean of its divisors is an integer number (61768671247).

Almost surely, 2^123537342493 is an apocalyptic number.

It is an amenable number.

123537342493 is a deficient number, since it is larger than the sum of its proper divisors (1).

123537342493 is an equidigital number, since it uses as much as digits as its factorization.

123537342493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 46.

The spelling of 123537342493 in words is "one hundred twenty-three billion, five hundred thirty-seven million, three hundred forty-two thousand, four hundred ninety-three".