1234889881 has 3 divisors (see below), whose sum is σ = 1234925023. Its totient is φ = 1234854740.

The previous prime is 1234889839. The next prime is 1234889899. The reversal of 1234889881 is 1889884321.

It is a happy number.

The square root of 1234889881 is 35141.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1889884321 = 13 ⋅145375717.

It can be written as a sum of positive squares in only one way, i.e., 513430281 + 721459600 = 22659^2 + 26860^2 .

It is not a de Polignac number, because 1234889881 - 2¹⁷ = 1234758809 is a prime.

It is a super-2 number, since 2×1234889881² = 3049906036392388322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1234889081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17571 + ... + 52711.

Almost surely, 2^1234889881 is an apocalyptic number.

1234889881 is the 35141-st square number.

1234889881 is the 17571-st centered octagonal number.

It is an amenable number.

1234889881 is a deficient number, since it is larger than the sum of its proper divisors (35142).

1234889881 is an frugal number, since it uses more digits than its factorization.

1234889881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70282 (or 35141 counting only the distinct ones).

The product of its digits is 884736, while the sum is 52.

The cubic root of 1234889881 is about 1072.8592352024.

The spelling of 1234889881 in words is "one billion, two hundred thirty-four million, eight hundred eighty-nine thousand, eight hundred eighty-one".