356808421 has 4 divisors (see below), whose sum is σ = 356867500. Its totient is φ = 356749344.

The previous prime is 356808383. The next prime is 356808449. The reversal of 356808421 is 124808653.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124808653 = 2111 ⋅59123.

It can be written as a sum of positive squares in 2 ways, for example, as 68657796 + 288150625 = 8286^2 + 16975^2 .

It is a cyclic number.

It is not a de Polignac number, because 356808421 - 2¹³ = 356800229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356802421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19296 + ... + 32953.

It is an arithmetic number, because the mean of its divisors is an integer number (89216875).

Almost surely, 2^356808421 is an apocalyptic number.

It is an amenable number.

356808421 is a deficient number, since it is larger than the sum of its proper divisors (59079).

356808421 is an equidigital number, since it uses as much as digits as its factorization.

356808421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59078.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 356808421 is about 18889.3732294113. The cubic root of 356808421 is about 709.2701757974.

The spelling of 356808421 in words is "three hundred fifty-six million, eight hundred eight thousand, four hundred twenty-one".