1964284687 has 2 divisors, whose sum is σ = 1964284688. Its totient is φ = 1964284686.

The previous prime is 1964284661. The next prime is 1964284691. The reversal of 1964284687 is 7864824691.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1964284687 - 2⁷ = 1964284559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964284187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982142343 + 982142344.

It is an arithmetic number, because the mean of its divisors is an integer number (982142344).

Almost surely, 2^1964284687 is an apocalyptic number.

1964284687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964284687 is an equidigital number, since it uses as much as digits as its factorization.

1964284687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The square root of 1964284687 is about 44320.2514320485. The cubic root of 1964284687 is about 1252.3762132528.

It can be divided in two parts, 19642 and 84687, that added together give a square (104329 = 323²).

The spelling of 1964284687 in words is "one billion, nine hundred sixty-four million, two hundred eighty-four thousand, six hundred eighty-seven".