395421487 has 2 divisors, whose sum is σ = 395421488. Its totient is φ = 395421486.

The previous prime is 395421463. The next prime is 395421491. The reversal of 395421487 is 784124593.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 395421487 - 2²³ = 387032879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395421427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197710743 + 197710744.

It is an arithmetic number, because the mean of its divisors is an integer number (197710744).

Almost surely, 2^395421487 is an apocalyptic number.

395421487 is a deficient number, since it is larger than the sum of its proper divisors (1).

395421487 is an equidigital number, since it uses as much as digits as its factorization.

395421487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 395421487 is about 19885.2077434459. The cubic root of 395421487 is about 733.9842739295.

The spelling of 395421487 in words is "three hundred ninety-five million, four hundred twenty-one thousand, four hundred eighty-seven".