29702109649 has 3 divisors (see below), whose sum is σ = 29702281993. Its totient is φ = 29701937306.

The previous prime is 29702109643. The next prime is 29702109709. The reversal of 29702109649 is 94690120792.

The square root of 29702109649 is 172343.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-29702109649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29702109643) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 86172 + ... + 258514.

Almost surely, 2^29702109649 is an apocalyptic number.

29702109649 is the 172343-rd square number.

29702109649 is the 86172-nd centered octagonal number.

It is an amenable number.

29702109649 is a deficient number, since it is larger than the sum of its proper divisors (172344).

29702109649 is an frugal number, since it uses more digits than its factorization.

29702109649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344686 (or 172343 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

Multiplying 29702109649 by its sum of digits (49), we get a square (1455403372801 = 1206401²).

The spelling of 29702109649 in words is "twenty-nine billion, seven hundred two million, one hundred nine thousand, six hundred forty-nine".