355406861 has 4 divisors (see below), whose sum is σ = 367662300. Its totient is φ = 343151424.

The previous prime is 355406791. The next prime is 355406893. The reversal of 355406861 is 168604553.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 201498025 + 153908836 = 14195^2 + 12406^2 .

It is a cyclic number.

It is not a de Polignac number, because 355406861 - 2²² = 351212557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355403861) 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 in 3 ways as a sum of consecutive naturals, for example, 6127676 + ... + 6127733.

It is an arithmetic number, because the mean of its divisors is an integer number (91915575).

Almost surely, 2^355406861 is an apocalyptic number.

It is an amenable number.

355406861 is a deficient number, since it is larger than the sum of its proper divisors (12255439).

355406861 is a wasteful number, since it uses less digits than its factorization.

355406861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12255438.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 355406861 is about 18852.2375595047. The cubic root of 355406861 is about 708.3402751369.

The spelling of 355406861 in words is "three hundred fifty-five million, four hundred six thousand, eight hundred sixty-one".