123789274569 has 63 divisors (see below), whose sum is σ = 189066277623. Its totient is φ = 81012580272.

The previous prime is 123789274549. The next prime is 123789274573. The reversal of 123789274569 is 965472987321.

The square root of 123789274569 is 351837.

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

123789274569 is a `hidden beast` number, since 1 + 23 + 78 + 92 + 7 + 456 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36284535225 + 87504739344 = 190485^2 + 295812^2 .

It is not a de Polignac number, because 123789274569 - 2⁵ = 123789274537 is a prime.

It is a super-2 number, since 2×123789274569² (a number of 23 digits) contains 22 as substring.

Its product of digits (45722880) is a multiple of the sum of its prime divisors (243).

It is not an unprimeable number, because it can be changed into a prime (123789274529) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 788466639 + ... + 788466795.

Almost surely, 2^123789274569 is an apocalyptic number.

123789274569 is the 351837-th square number.

123789274569 is the 175919-th centered octagonal number.

It is an amenable number.

123789274569 is a deficient number, since it is larger than the sum of its proper divisors (65277003054).

123789274569 is an frugal number, since it uses more digits than its factorization.

123789274569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 243 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 123789274569 in words is "one hundred twenty-three billion, seven hundred eighty-nine million, two hundred seventy-four thousand, five hundred sixty-nine".