124278013693 has 2 divisors, whose sum is σ = 124278013694. Its totient is φ = 124278013692.

The previous prime is 124278013669. The next prime is 124278013733. The reversal of 124278013693 is 396310872421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80051082489 + 44226931204 = 282933^2 + 210302^2 .

It is a cyclic number.

It is not a de Polignac number, because 124278013693 - 2²⁹ = 123741142781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124278013603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62139006846 + 62139006847.

It is an arithmetic number, because the mean of its divisors is an integer number (62139006847).

Almost surely, 2^124278013693 is an apocalyptic number.

It is an amenable number.

124278013693 is a deficient number, since it is larger than the sum of its proper divisors (1).

124278013693 is an equidigital number, since it uses as much as digits as its factorization.

124278013693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 124278013693 in words is "one hundred twenty-four billion, two hundred seventy-eight million, thirteen thousand, six hundred ninety-three".