427331587 has 2 divisors, whose sum is σ = 427331588. Its totient is φ = 427331586.

The previous prime is 427331573. The next prime is 427331591. The reversal of 427331587 is 785133724.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427331587 is a prime.

It is a super-2 number, since 2×427331587² = 365224570495877138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427331507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213665793 + 213665794.

It is an arithmetic number, because the mean of its divisors is an integer number (213665794).

Almost surely, 2^427331587 is an apocalyptic number.

427331587 is a deficient number, since it is larger than the sum of its proper divisors (1).

427331587 is an equidigital number, since it uses as much as digits as its factorization.

427331587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 427331587 is about 20672.0000725619. Note that the first 4 decimals coincide. The cubic root of 427331587 is about 753.2196913749.

The spelling of 427331587 in words is "four hundred twenty-seven million, three hundred thirty-one thousand, five hundred eighty-seven".