835287421 has 2 divisors, whose sum is σ = 835287422. Its totient is φ = 835287420.

The previous prime is 835287419. The next prime is 835287487. The reversal of 835287421 is 124782538.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779247225 + 56040196 = 27915^2 + 7486^2 .

It is a cyclic number.

It is not a de Polignac number, because 835287421 - 2¹ = 835287419 is a prime.

Together with 835287419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (835287491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417643710 + 417643711.

It is an arithmetic number, because the mean of its divisors is an integer number (417643711).

Almost surely, 2^835287421 is an apocalyptic number.

It is an amenable number.

835287421 is a deficient number, since it is larger than the sum of its proper divisors (1).

835287421 is an equidigital number, since it uses as much as digits as its factorization.

835287421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 835287421 is about 28901.3394326284. The cubic root of 835287421 is about 941.7710014589.

The spelling of 835287421 in words is "eight hundred thirty-five million, two hundred eighty-seven thousand, four hundred twenty-one".