854640929 has 2 divisors, whose sum is σ = 854640930. Its totient is φ = 854640928.

The previous prime is 854640893. The next prime is 854640931. The reversal of 854640929 is 929046458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792309904 + 62331025 = 28148^2 + 7895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-854640929 is a prime.

It is a super-2 number, since 2×854640929² = 1460822235043966082, which contains 22 as substring.

Together with 854640931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (854640959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427320464 + 427320465.

It is an arithmetic number, because the mean of its divisors is an integer number (427320465).

Almost surely, 2^854640929 is an apocalyptic number.

It is an amenable number.

854640929 is a deficient number, since it is larger than the sum of its proper divisors (1).

854640929 is an equidigital number, since it uses as much as digits as its factorization.

854640929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 854640929 is about 29234.2424050975. The cubic root of 854640929 is about 948.9891108502.

The spelling of 854640929 in words is "eight hundred fifty-four million, six hundred forty thousand, nine hundred twenty-nine".