423686849 has 4 divisors (see below), whose sum is σ = 426224064. Its totient is φ = 421149636.

The previous prime is 423686831. The next prime is 423686867. The reversal of 423686849 is 948686324.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (423686831) and next prime (423686867).

It is a cyclic number.

It is not a de Polignac number, because 423686849 - 2¹⁶ = 423621313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423686797 and 423686806.

It is not an unprimeable number, because it can be changed into a prime (423682849) 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, 1268357 + ... + 1268690.

It is an arithmetic number, because the mean of its divisors is an integer number (106556016).

Almost surely, 2^423686849 is an apocalyptic number.

It is an amenable number.

423686849 is a deficient number, since it is larger than the sum of its proper divisors (2537215).

423686849 is a wasteful number, since it uses less digits than its factorization.

423686849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537214.

The product of its digits is 1990656, while the sum is 50.

The square root of 423686849 is about 20583.6548989726. The cubic root of 423686849 is about 751.0721548778.

The spelling of 423686849 in words is "four hundred twenty-three million, six hundred eighty-six thousand, eight hundred forty-nine".