948595815421 has 2 divisors, whose sum is σ = 948595815422. Its totient is φ = 948595815420.

The previous prime is 948595815413. The next prime is 948595815449. The reversal of 948595815421 is 124518595849.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 912189267396 + 36406548025 = 955086^2 + 190805^2 .

It is an emirp because it is prime and its reverse (124518595849) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 948595815421 - 2³ = 948595815413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 948595815421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (948595815451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474297907710 + 474297907711.

It is an arithmetic number, because the mean of its divisors is an integer number (474297907711).

Almost surely, 2^948595815421 is an apocalyptic number.

It is an amenable number.

948595815421 is a deficient number, since it is larger than the sum of its proper divisors (1).

948595815421 is an equidigital number, since it uses as much as digits as its factorization.

948595815421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736000, while the sum is 61.

The spelling of 948595815421 in words is "nine hundred forty-eight billion, five hundred ninety-five million, eight hundred fifteen thousand, four hundred twenty-one".