1023366821 has 2 divisors, whose sum is σ = 1023366822. Its totient is φ = 1023366820.

The previous prime is 1023366803. The next prime is 1023366863. The reversal of 1023366821 is 1286633201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 740656225 + 282710596 = 27215^2 + 16814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023366821 - 2²⁶ = 956257957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023366871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511683410 + 511683411.

It is an arithmetic number, because the mean of its divisors is an integer number (511683411).

Almost surely, 2^1023366821 is an apocalyptic number.

It is an amenable number.

1023366821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023366821 is an equidigital number, since it uses as much as digits as its factorization.

1023366821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1023366821 is about 31990.1050482802. The cubic root of 1023366821 is about 1007.7290482402.

The spelling of 1023366821 in words is "one billion, twenty-three million, three hundred sixty-six thousand, eight hundred twenty-one".