1921462687 has 2 divisors, whose sum is σ = 1921462688. Its totient is φ = 1921462686.

The previous prime is 1921462681. The next prime is 1921462691. The reversal of 1921462687 is 7862641291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1921462687 - 2³ = 1921462679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1921462681) 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, 960731343 + 960731344.

It is an arithmetic number, because the mean of its divisors is an integer number (960731344).

Almost surely, 2^1921462687 is an apocalyptic number.

1921462687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921462687 is an equidigital number, since it uses as much as digits as its factorization.

1921462687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 1921462687 is about 43834.4919783497. The cubic root of 1921462687 is about 1243.2085409199.

The spelling of 1921462687 in words is "one billion, nine hundred twenty-one million, four hundred sixty-two thousand, six hundred eighty-seven".