921642611 has 2 divisors, whose sum is σ = 921642612. Its totient is φ = 921642610.

The previous prime is 921642569. The next prime is 921642643. The reversal of 921642611 is 116246129.

It is an a-pointer prime, because the next prime (921642643) can be obtained adding 921642611 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 921642611 - 2¹⁴ = 921626227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (921642691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460821305 + 460821306.

It is an arithmetic number, because the mean of its divisors is an integer number (460821306).

Almost surely, 2^921642611 is an apocalyptic number.

921642611 is a deficient number, since it is larger than the sum of its proper divisors (1).

921642611 is an equidigital number, since it uses as much as digits as its factorization.

921642611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 921642611 is about 30358.5673410324. The cubic root of 921642611 is about 973.1673172498.

The spelling of 921642611 in words is "nine hundred twenty-one million, six hundred forty-two thousand, six hundred eleven".