854373721 has 2 divisors, whose sum is σ = 854373722. Its totient is φ = 854373720.

The previous prime is 854373713. The next prime is 854373761. The reversal of 854373721 is 127373458.

It is a happy number.

It is an a-pointer prime, because the next prime (854373761) can be obtained adding 854373721 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757075225 + 97298496 = 27515^2 + 9864^2 .

It is a cyclic number.

It is not a de Polignac number, because 854373721 - 2³ = 854373713 is a prime.

It is not a weakly prime, because it can be changed into another prime (854373761) 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, 427186860 + 427186861.

It is an arithmetic number, because the mean of its divisors is an integer number (427186861).

Almost surely, 2^854373721 is an apocalyptic number.

It is an amenable number.

854373721 is a deficient number, since it is larger than the sum of its proper divisors (1).

854373721 is an equidigital number, since it uses as much as digits as its factorization.

854373721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 854373721 is about 29229.6719276833. The cubic root of 854373721 is about 948.8901983885.

The spelling of 854373721 in words is "eight hundred fifty-four million, three hundred seventy-three thousand, seven hundred twenty-one".