127390019873 has 2 divisors, whose sum is σ = 127390019874. Its totient is φ = 127390019872.

The previous prime is 127390019839. The next prime is 127390019881. The reversal of 127390019873 is 378910093721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90716620864 + 36673399009 = 301192^2 + 191503^2 .

It is a cyclic number.

It is not a de Polignac number, because 127390019873 - 2¹² = 127390015777 is a prime.

It is a super-2 number, since 2×127390019873² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (127390019173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63695009936 + 63695009937.

It is an arithmetic number, because the mean of its divisors is an integer number (63695009937).

Almost surely, 2^127390019873 is an apocalyptic number.

It is an amenable number.

127390019873 is a deficient number, since it is larger than the sum of its proper divisors (1).

127390019873 is an equidigital number, since it uses as much as digits as its factorization.

127390019873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 127390019873 in words is "one hundred twenty-seven billion, three hundred ninety million, nineteen thousand, eight hundred seventy-three".