427406531 has 2 divisors, whose sum is σ = 427406532. Its totient is φ = 427406530.

The previous prime is 427406521. The next prime is 427406533. The reversal of 427406531 is 135604724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427406531 - 2¹⁰ = 427405507 is a prime.

It is a super-2 number, since 2×427406531² = 365352685482907922, which contains 22 as substring.

Together with 427406533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (427406533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213703265 + 213703266.

It is an arithmetic number, because the mean of its divisors is an integer number (213703266).

Almost surely, 2^427406531 is an apocalyptic number.

427406531 is a deficient number, since it is larger than the sum of its proper divisors (1).

427406531 is an equidigital number, since it uses as much as digits as its factorization.

427406531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 427406531 is about 20673.8126865849. The cubic root of 427406531 is about 753.2637211936.

The spelling of 427406531 in words is "four hundred twenty-seven million, four hundred six thousand, five hundred thirty-one".