254999999993 has 2 divisors, whose sum is σ = 254999999994. Its totient is φ = 254999999992.

The previous prime is 254999999957. The next prime is 255000000007. The reversal of 254999999993 is 399999999452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249168692224 + 5831307769 = 499168^2 + 76363^2 .

It is a cyclic number.

It is not a de Polignac number, because 254999999993 - 2⁶ = 254999999929 is a prime.

It is not a weakly prime, because it can be changed into another prime (254999909993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127499999996 + 127499999997.

It is an arithmetic number, because the mean of its divisors is an integer number (127499999997).

Almost surely, 2^254999999993 is an apocalyptic number.

It is an amenable number.

254999999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

254999999993 is an equidigital number, since it uses as much as digits as its factorization.

254999999993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5165606520, while the sum is 86.

The spelling of 254999999993 in words is "two hundred fifty-four billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".