949728421 has 2 divisors, whose sum is σ = 949728422. Its totient is φ = 949728420.

The previous prime is 949728419. The next prime is 949728449. The reversal of 949728421 is 124827949.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 780364225 + 169364196 = 27935^2 + 13014^2 .

It is an emirp because it is prime and its reverse (124827949) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 949728421 - 2¹ = 949728419 is a prime.

Together with 949728419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (949728821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474864210 + 474864211.

It is an arithmetic number, because the mean of its divisors is an integer number (474864211).

Almost surely, 2^949728421 is an apocalyptic number.

It is an amenable number.

949728421 is a deficient number, since it is larger than the sum of its proper divisors (1).

949728421 is an equidigital number, since it uses as much as digits as its factorization.

949728421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 949728421 is about 30817.6641068073. The cubic root of 949728421 is about 982.9538880982.

The spelling of 949728421 in words is "nine hundred forty-nine million, seven hundred twenty-eight thousand, four hundred twenty-one".