835138897 has 8 divisors (see below), whose sum is σ = 864268200. Its totient is φ = 806031744.

The previous prime is 835138883. The next prime is 835138921. The reversal of 835138897 is 798831538.

835138897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 304711936 + 530426961 = 17456^2 + 23031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 835138897 - 2²³ = 826750289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (835138807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118879 + ... + 125707.

It is an arithmetic number, because the mean of its divisors is an integer number (108033525).

Almost surely, 2^835138897 is an apocalyptic number.

It is an amenable number.

835138897 is a deficient number, since it is larger than the sum of its proper divisors (29129303).

835138897 is a wasteful number, since it uses less digits than its factorization.

835138897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11075.

The product of its digits is 1451520, while the sum is 52.

The square root of 835138897 is about 28898.7698181082. The cubic root of 835138897 is about 941.7151788027.

The spelling of 835138897 in words is "eight hundred thirty-five million, one hundred thirty-eight thousand, eight hundred ninety-seven".