427431569 has 2 divisors, whose sum is σ = 427431570. Its totient is φ = 427431568.

The previous prime is 427431559. The next prime is 427431593. The reversal of 427431569 is 965134724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221652544 + 205779025 = 14888^2 + 14345^2 .

It is a cyclic number.

It is not a de Polignac number, because 427431569 - 2⁴ = 427431553 is a prime.

It is a super-2 number, since 2×427431569² = 365395492355603522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427431559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213715784 + 213715785.

It is an arithmetic number, because the mean of its divisors is an integer number (213715785).

Almost surely, 2^427431569 is an apocalyptic number.

It is an amenable number.

427431569 is a deficient number, since it is larger than the sum of its proper divisors (1).

427431569 is an equidigital number, since it uses as much as digits as its factorization.

427431569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 427431569 is about 20674.4182263976. The cubic root of 427431569 is about 753.2784299446.

The spelling of 427431569 in words is "four hundred twenty-seven million, four hundred thirty-one thousand, five hundred sixty-nine".