125000000813 has 2 divisors, whose sum is σ = 125000000814. Its totient is φ = 125000000812.

The previous prime is 125000000747. The next prime is 125000000843. The reversal of 125000000813 is 318000000521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65611285609 + 59388715204 = 256147^2 + 243698^2 .

It is a cyclic number.

It is not a de Polignac number, because 125000000813 - 2¹² = 124999996717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125000000843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62500000406 + 62500000407.

It is an arithmetic number, because the mean of its divisors is an integer number (62500000407).

Almost surely, 2^125000000813 is an apocalyptic number.

It is an amenable number.

125000000813 is a deficient number, since it is larger than the sum of its proper divisors (1).

125000000813 is an equidigital number, since it uses as much as digits as its factorization.

125000000813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 125000000813 in words is "one hundred twenty-five billion, eight hundred thirteen", and thus it is an aban number.