1641406323 has 4 divisors (see below), whose sum is σ = 2188541768. Its totient is φ = 1094270880.

The previous prime is 1641406297. The next prime is 1641406331. The reversal of 1641406323 is 3236041461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3236041461 = 3 ⋅1078680487.

It is not a de Polignac number, because 1641406323 - 2¹³ = 1641398131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641306323) 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, 273567718 + ... + 273567723.

It is an arithmetic number, because the mean of its divisors is an integer number (547135442).

Almost surely, 2^1641406323 is an apocalyptic number.

1641406323 is a deficient number, since it is larger than the sum of its proper divisors (547135445).

1641406323 is an equidigital number, since it uses as much as digits as its factorization.

1641406323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547135444.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1641406323 is about 40514.2730775217. The cubic root of 1641406323 is about 1179.6106929370.

Adding to 1641406323 its reverse (3236041461), we get a palindrome (4877447784).

The spelling of 1641406323 in words is "one billion, six hundred forty-one million, four hundred six thousand, three hundred twenty-three".