1641347347 has 4 divisors (see below), whose sum is σ = 1647449280. Its totient is φ = 1635245416.

The previous prime is 1641347329. The next prime is 1641347369. The reversal of 1641347347 is 7437431461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7437431461 = 409 ⋅18184429.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641347347 is a prime.

It is a super-2 number, since 2×1641347347² = 5388042227007876818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641347317) 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, 3050563 + ... + 3051100.

It is an arithmetic number, because the mean of its divisors is an integer number (411862320).

Almost surely, 2^1641347347 is an apocalyptic number.

1641347347 is a deficient number, since it is larger than the sum of its proper divisors (6101933).

1641347347 is an equidigital number, since it uses as much as digits as its factorization.

1641347347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6101932.

The product of its digits is 169344, while the sum is 40.

The square root of 1641347347 is about 40513.5452287257. The cubic root of 1641347347 is about 1179.5965648989.

The spelling of 1641347347 in words is "one billion, six hundred forty-one million, three hundred forty-seven thousand, three hundred forty-seven".