1628243087 has 2 divisors, whose sum is σ = 1628243088. Its totient is φ = 1628243086.

The previous prime is 1628243083. The next prime is 1628243143. The reversal of 1628243087 is 7803428261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1628243087 - 2² = 1628243083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1628243083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814121543 + 814121544.

It is an arithmetic number, because the mean of its divisors is an integer number (814121544).

Almost surely, 2^1628243087 is an apocalyptic number.

1628243087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628243087 is an equidigital number, since it uses as much as digits as its factorization.

1628243087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 1628243087 is about 40351.4942350342. The cubic root of 1628243087 is about 1176.4489352108.

The spelling of 1628243087 in words is "one billion, six hundred twenty-eight million, two hundred forty-three thousand, eighty-seven".