29905822489 has 3 divisors (see below), whose sum is σ = 29905995423. Its totient is φ = 29905649556.

The previous prime is 29905822487. The next prime is 29905822523. The reversal of 29905822489 is 98422850992.

The square root of 29905822489 is 172933.

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 can be written as a sum of positive squares in only one way, i.e., 14506998025 + 15398824464 = 120445^2 + 124092^2 .

It is not a de Polignac number, because 29905822489 - 2¹ = 29905822487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29905822487) 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, 86467 + ... + 259399.

It is an arithmetic number, because the mean of its divisors is an integer number (9968665141).

Almost surely, 2^29905822489 is an apocalyptic number.

29905822489 is the 172933-rd square number.

29905822489 is the 86467-th centered octagonal number.

It is an amenable number.

29905822489 is a deficient number, since it is larger than the sum of its proper divisors (172934).

29905822489 is an frugal number, since it uses more digits than its factorization.

29905822489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345866 (or 172933 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 29905822489 in words is "twenty-nine billion, nine hundred five million, eight hundred twenty-two thousand, four hundred eighty-nine".