1023273821 has 2 divisors, whose sum is σ = 1023273822. Its totient is φ = 1023273820.

The previous prime is 1023273803. The next prime is 1023273847. The reversal of 1023273821 is 1283723201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010349796 + 12924025 = 31786^2 + 3595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023273821 - 2¹⁴ = 1023257437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022273821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511636910 + 511636911.

It is an arithmetic number, because the mean of its divisors is an integer number (511636911).

Almost surely, 2^1023273821 is an apocalyptic number.

It is an amenable number.

1023273821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023273821 is an equidigital number, since it uses as much as digits as its factorization.

1023273821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1023273821 is about 31988.6514407844. The cubic root of 1023273821 is about 1007.6985210175.

The spelling of 1023273821 in words is "one billion, twenty-three million, two hundred seventy-three thousand, eight hundred twenty-one".