949992821 has 2 divisors, whose sum is σ = 949992822. Its totient is φ = 949992820.

The previous prime is 949992787. The next prime is 949992947. The reversal of 949992821 is 128299949.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 888934225 + 61058596 = 29815^2 + 7814^2 .

It is an emirp because it is prime and its reverse (128299949) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 949992821 - 2¹⁰ = 949991797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (949992221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474996410 + 474996411.

It is an arithmetic number, because the mean of its divisors is an integer number (474996411).

Almost surely, 2^949992821 is an apocalyptic number.

It is an amenable number.

949992821 is a deficient number, since it is larger than the sum of its proper divisors (1).

949992821 is an equidigital number, since it uses as much as digits as its factorization.

949992821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 949992821 is about 30821.9535558666. The cubic root of 949992821 is about 983.0450962402.

It can be divided in two parts, 9499928 and 21, that added together give a palindrome (9499949).

The spelling of 949992821 in words is "nine hundred forty-nine million, nine hundred ninety-two thousand, eight hundred twenty-one".