427124869 has 2 divisors, whose sum is σ = 427124870. Its totient is φ = 427124868.

The previous prime is 427124857. The next prime is 427124897. The reversal of 427124869 is 968421724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308423844 + 118701025 = 17562^2 + 10895^2 .

It is a cyclic number.

It is not a de Polignac number, because 427124869 - 2⁵ = 427124837 is a prime.

It is a super-2 number, since 2×427124869² = 364871307436534322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427124809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213562434 + 213562435.

It is an arithmetic number, because the mean of its divisors is an integer number (213562435).

Almost surely, 2^427124869 is an apocalyptic number.

It is an amenable number.

427124869 is a deficient number, since it is larger than the sum of its proper divisors (1).

427124869 is an equidigital number, since it uses as much as digits as its factorization.

427124869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 427124869 is about 20666.9995161368. Note that the first 3 decimals coincide. The cubic root of 427124869 is about 753.0982172578.

The spelling of 427124869 in words is "four hundred twenty-seven million, one hundred twenty-four thousand, eight hundred sixty-nine".