875539421 has 2 divisors, whose sum is σ = 875539422. Its totient is φ = 875539420.

The previous prime is 875539403. The next prime is 875539429. The reversal of 875539421 is 124935578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632522500 + 243016921 = 25150^2 + 15589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-875539421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (875539429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437769710 + 437769711.

It is an arithmetic number, because the mean of its divisors is an integer number (437769711).

Almost surely, 2^875539421 is an apocalyptic number.

It is an amenable number.

875539421 is a deficient number, since it is larger than the sum of its proper divisors (1).

875539421 is an equidigital number, since it uses as much as digits as its factorization.

875539421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The square root of 875539421 is about 29589.5153897457. The cubic root of 875539421 is about 956.6620986777.

The spelling of 875539421 in words is "eight hundred seventy-five million, five hundred thirty-nine thousand, four hundred twenty-one".