1921136927 has 2 divisors, whose sum is σ = 1921136928. Its totient is φ = 1921136926.

The previous prime is 1921136897. The next prime is 1921136933. The reversal of 1921136927 is 7296311291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1921136927 - 2¹² = 1921132831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1921136827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960568463 + 960568464.

It is an arithmetic number, because the mean of its divisors is an integer number (960568464).

Almost surely, 2^1921136927 is an apocalyptic number.

1921136927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921136927 is an equidigital number, since it uses as much as digits as its factorization.

1921136927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 1921136927 is about 43830.7760255280. The cubic root of 1921136927 is about 1243.1382801222.

The spelling of 1921136927 in words is "one billion, nine hundred twenty-one million, one hundred thirty-six thousand, nine hundred twenty-seven".