2347543661 has 2 divisors, whose sum is σ = 2347543662. Its totient is φ = 2347543660.

The previous prime is 2347543643. The next prime is 2347543663. The reversal of 2347543661 is 1663457432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2228406436 + 119137225 = 47206^2 + 10915^2 .

It is a cyclic number.

It is not a de Polignac number, because 2347543661 - 2²² = 2343349357 is a prime.

It is a super-2 number, since 2×2347543661² = 11021922480602565842, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2347543663, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2347543663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1173771830 + 1173771831.

It is an arithmetic number, because the mean of its divisors is an integer number (1173771831).

Almost surely, 2^2347543661 is an apocalyptic number.

It is an amenable number.

2347543661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2347543661 is an equidigital number, since it uses as much as digits as its factorization.

2347543661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 41.

The square root of 2347543661 is about 48451.4567479658. The cubic root of 2347543661 is about 1329.0395124967.

The spelling of 2347543661 in words is "two billion, three hundred forty-seven million, five hundred forty-three thousand, six hundred sixty-one".