806790121 has 8 divisors (see below), whose sum is σ = 842877000. Its totient is φ = 771254400.

The previous prime is 806790119. The next prime is 806790137. The reversal of 806790121 is 121097608.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 367258896 + 439531225 = 19164^2 + 20965^2 .

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 806790121 - 2¹ = 806790119 is a prime.

It is a super-4 number, since 4×806790121⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806790181) 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, 134796 + ... + 140653.

It is an arithmetic number, because the mean of its divisors is an integer number (105359625).

Almost surely, 2^806790121 is an apocalyptic number.

It is an amenable number.

806790121 is a deficient number, since it is larger than the sum of its proper divisors (36086879).

806790121 is a wasteful number, since it uses less digits than its factorization.

806790121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275579.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 806790121 is about 28404.0511371177. The cubic root of 806790121 is about 930.9367833572.

The spelling of 806790121 in words is "eight hundred six million, seven hundred ninety thousand, one hundred twenty-one".