1641797413 has 4 divisors (see below), whose sum is σ = 1666301920. Its totient is φ = 1617292908.

The previous prime is 1641797393. The next prime is 1641797419. The reversal of 1641797413 is 3147971461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3147971461 = 83 ⋅37927367.

It is a cyclic number.

It is not a de Polignac number, because 1641797413 - 2²¹ = 1639700261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641797413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641797419) 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, 12252153 + ... + 12252286.

It is an arithmetic number, because the mean of its divisors is an integer number (416575480).

Almost surely, 2^1641797413 is an apocalyptic number.

It is an amenable number.

1641797413 is a deficient number, since it is larger than the sum of its proper divisors (24504507).

1641797413 is an equidigital number, since it uses as much as digits as its factorization.

1641797413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24504506.

The product of its digits is 127008, while the sum is 43.

The square root of 1641797413 is about 40519.0993606719. The cubic root of 1641797413 is about 1179.7043722218.

The spelling of 1641797413 in words is "one billion, six hundred forty-one million, seven hundred ninety-seven thousand, four hundred thirteen".