123749060557 has 2 divisors, whose sum is σ = 123749060558. Its totient is φ = 123749060556.

The previous prime is 123749060537. The next prime is 123749060573. The reversal of 123749060557 is 755060947321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74700542596 + 49048517961 = 273314^2 + 221469^2 .

It is a cyclic number.

It is not a de Polignac number, because 123749060557 - 2³⁵ = 89389322189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123749060557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123749060537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61874530278 + 61874530279.

It is an arithmetic number, because the mean of its divisors is an integer number (61874530279).

Almost surely, 2^123749060557 is an apocalyptic number.

It is an amenable number.

123749060557 is a deficient number, since it is larger than the sum of its proper divisors (1).

123749060557 is an equidigital number, since it uses as much as digits as its factorization.

123749060557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 123749060557 in words is "one hundred twenty-three billion, seven hundred forty-nine million, sixty thousand, five hundred fifty-seven".