423857650129 has 4 divisors (see below), whose sum is σ = 424054520676. Its totient is φ = 423660779584.

The previous prime is 423857650081. The next prime is 423857650159. The reversal of 423857650129 is 921056758324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106049225104 + 317808425025 = 325652^2 + 563745^2 .

It is a cyclic number.

It is not a de Polignac number, because 423857650129 - 2⁷ = 423857650001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423857650159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98432044 + ... + 98436349.

It is an arithmetic number, because the mean of its divisors is an integer number (106013630169).

It is a 1-persistent number, because it is pandigital, but 2⋅423857650129 = 847715300258 is not.

Almost surely, 2^423857650129 is an apocalyptic number.

It is an amenable number.

423857650129 is a deficient number, since it is larger than the sum of its proper divisors (196870547).

423857650129 is a wasteful number, since it uses less digits than its factorization.

423857650129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196870546.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 423857650129 in words is "four hundred twenty-three billion, eight hundred fifty-seven million, six hundred fifty thousand, one hundred twenty-nine".