29839453081 has 3 divisors (see below), whose sum is σ = 29839625823. Its totient is φ = 29839280340.

The previous prime is 29839453079. The next prime is 29839453109. The reversal of 29839453081 is 18035493892.

The square root of 29839453081 is 172741.

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., 2673820681 + 27165632400 = 51709^2 + 164820^2 .

It is not a de Polignac number, because 29839453081 - 2¹ = 29839453079 is a prime.

It is a super-2 number, since 2×29839453081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29839453481) 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, 86371 + ... + 259111.

It is an arithmetic number, because the mean of its divisors is an integer number (9946541941).

Almost surely, 2^29839453081 is an apocalyptic number.

29839453081 is the 172741-st square number.

29839453081 is the 86371-st centered octagonal number.

It is an amenable number.

29839453081 is a deficient number, since it is larger than the sum of its proper divisors (172742).

29839453081 is an frugal number, since it uses more digits than its factorization.

29839453081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345482 (or 172741 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 29839453081 in words is "twenty-nine billion, eight hundred thirty-nine million, four hundred fifty-three thousand, eighty-one".