2102939747 has 4 divisors (see below), whose sum is σ = 2112123120. Its totient is φ = 2093756376.

The previous prime is 2102939723. The next prime is 2102939759. The reversal of 2102939747 is 7479392012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102939747 - 2¹² = 2102935651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102939698 and 2102939707.

It is not an unprimeable number, because it can be changed into a prime (2102939767) 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, 4591343 + ... + 4591800.

It is an arithmetic number, because the mean of its divisors is an integer number (528030780).

Almost surely, 2^2102939747 is an apocalyptic number.

2102939747 is a deficient number, since it is larger than the sum of its proper divisors (9183373).

2102939747 is an equidigital number, since it uses as much as digits as its factorization.

2102939747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9183372.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 2102939747 is about 45857.8210014388. The cubic root of 2102939747 is about 1281.1764385543.

The spelling of 2102939747 in words is "two billion, one hundred two million, nine hundred thirty-nine thousand, seven hundred forty-seven".