124787682009 has 9 divisors (see below), whose sum is σ = 180250404789. Its totient is φ = 83191081500.

The previous prime is 124787682001. The next prime is 124787682017. The reversal of 124787682009 is 900286787421.

It is a happy number.

The square root of 124787682009 is 353253.

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

It is an interprime number because it is at equal distance from previous prime (124787682001) and next prime (124787682017).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 124787682009 - 2³ = 124787682001 is a prime.

It is a super-4 number, since 4×124787682009⁴ (a number of 45 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (124787682001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1000884 + ... + 1118634.

Almost surely, 2^124787682009 is an apocalyptic number.

124787682009 is the 353253-rd square number.

124787682009 is the 176627-th centered octagonal number.

It is an amenable number.

124787682009 is a deficient number, since it is larger than the sum of its proper divisors (55462722780).

124787682009 is an frugal number, since it uses more digits than its factorization.

124787682009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235508 (or 117754 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 124787682009 in words is "one hundred twenty-four billion, seven hundred eighty-seven million, six hundred eighty-two thousand, nine".