2102009747 has 2 divisors, whose sum is σ = 2102009748. Its totient is φ = 2102009746.

The previous prime is 2102009719. The next prime is 2102009759. The reversal of 2102009747 is 7479002012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2102009747 - 2¹² = 2102005651 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102029747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051004873 + 1051004874.

It is an arithmetic number, because the mean of its divisors is an integer number (1051004874).

Almost surely, 2^2102009747 is an apocalyptic number.

2102009747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102009747 is an equidigital number, since it uses as much as digits as its factorization.

2102009747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 2102009747 is about 45847.6798431502. The cubic root of 2102009747 is about 1280.9875490448.

The spelling of 2102009747 in words is "two billion, one hundred two million, nine thousand, seven hundred forty-seven".