1123581897 has 12 divisors (see below), whose sum is σ = 1634629360. Its totient is φ = 743664888.

The previous prime is 1123581883. The next prime is 1123581911. The reversal of 1123581897 is 7981853211.

1123581897 is a `hidden beast` number, since 112 + 358 + 189 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1123581883) and next prime (1123581911).

It is not a de Polignac number, because 1123581897 - 2⁴ = 1123581881 is a prime.

It is a super-2 number, since 2×1123581897² = 2524872558532237218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123581497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 447823 + ... + 450324.

Almost surely, 2^1123581897 is an apocalyptic number.

It is an amenable number.

1123581897 is a deficient number, since it is larger than the sum of its proper divisors (511047463).

1123581897 is a wasteful number, since it uses less digits than its factorization.

1123581897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898292 (or 898289 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1123581897 is about 33519.8731650345. The cubic root of 1123581897 is about 1039.6047243541.

The spelling of 1123581897 in words is "one billion, one hundred twenty-three million, five hundred eighty-one thousand, eight hundred ninety-seven".