75005800421 has 2 divisors, whose sum is σ = 75005800422. Its totient is φ = 75005800420.

The previous prime is 75005800399. The next prime is 75005800511. The reversal of 75005800421 is 12400850057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64523112196 + 10482688225 = 254014^2 + 102385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75005800421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75005800921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37502900210 + 37502900211.

It is an arithmetic number, because the mean of its divisors is an integer number (37502900211).

Almost surely, 2^75005800421 is an apocalyptic number.

It is an amenable number.

75005800421 is a deficient number, since it is larger than the sum of its proper divisors (1).

75005800421 is an equidigital number, since it uses as much as digits as its factorization.

75005800421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 32.

The spelling of 75005800421 in words is "seventy-five billion, five million, eight hundred thousand, four hundred twenty-one".