1023816817 has 2 divisors, whose sum is σ = 1023816818. Its totient is φ = 1023816816.

The previous prime is 1023816797. The next prime is 1023816821. The reversal of 1023816817 is 7186183201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 694902321 + 328914496 = 26361^2 + 18136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023816817 - 2²⁷ = 889599089 is a prime.

It is a super-2 number, since 2×1023816817² = 2096401749544022978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1023816877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511908408 + 511908409.

It is an arithmetic number, because the mean of its divisors is an integer number (511908409).

Almost surely, 2^1023816817 is an apocalyptic number.

It is an amenable number.

1023816817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023816817 is an equidigital number, since it uses as much as digits as its factorization.

1023816817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1023816817 is about 31997.1376376075. The cubic root of 1023816817 is about 1007.8767331760.

The spelling of 1023816817 in words is "one billion, twenty-three million, eight hundred sixteen thousand, eight hundred seventeen".