395428987 has 2 divisors, whose sum is σ = 395428988. Its totient is φ = 395428986.

The previous prime is 395428973. The next prime is 395429017. The reversal of 395428987 is 789824593.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 395428987 - 2¹¹ = 395426939 is a prime.

It is not a weakly prime, because it can be changed into another prime (395428927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197714493 + 197714494.

It is an arithmetic number, because the mean of its divisors is an integer number (197714494).

Almost surely, 2^395428987 is an apocalyptic number.

395428987 is a deficient number, since it is larger than the sum of its proper divisors (1).

395428987 is an equidigital number, since it uses as much as digits as its factorization.

395428987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The square root of 395428987 is about 19885.3963249416. The cubic root of 395428987 is about 733.9889144185.

The spelling of 395428987 in words is "three hundred ninety-five million, four hundred twenty-eight thousand, nine hundred eighty-seven".