1118531023 has 2 divisors, whose sum is σ = 1118531024. Its totient is φ = 1118531022.

The previous prime is 1118531017. The next prime is 1118531069. The reversal of 1118531023 is 3201358111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1118531023 - 2¹³ = 1118522831 is a prime.

It is a super-2 number, since 2×1118531023² = 2502223298826853058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118535023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559265511 + 559265512.

It is an arithmetic number, because the mean of its divisors is an integer number (559265512).

Almost surely, 2^1118531023 is an apocalyptic number.

1118531023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118531023 is an equidigital number, since it uses as much as digits as its factorization.

1118531023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1118531023 is about 33444.4468185677. The cubic root of 1118531023 is about 1038.0445946787.

Adding to 1118531023 its reverse (3201358111), we get a palindrome (4319889134).

The spelling of 1118531023 in words is "one billion, one hundred eighteen million, five hundred thirty-one thousand, twenty-three".