921061811 has 2 divisors, whose sum is σ = 921061812. Its totient is φ = 921061810.

The previous prime is 921061793. The next prime is 921061829. The reversal of 921061811 is 118160129.

It is a balanced prime because it is at equal distance from previous prime (921061793) and next prime (921061829).

It is a cyclic number.

It is not a de Polignac number, because 921061811 - 2¹⁴ = 921045427 is a prime.

It is not a weakly prime, because it can be changed into another prime (921061511) 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, 460530905 + 460530906.

It is an arithmetic number, because the mean of its divisors is an integer number (460530906).

Almost surely, 2^921061811 is an apocalyptic number.

921061811 is a deficient number, since it is larger than the sum of its proper divisors (1).

921061811 is an equidigital number, since it uses as much as digits as its factorization.

921061811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 921061811 is about 30349.0001647501. Note that the first 3 decimals coincide. The cubic root of 921061811 is about 972.9628510277.

The spelling of 921061811 in words is "nine hundred twenty-one million, sixty-one thousand, eight hundred eleven".