29729890621 has 8 divisors (see below), whose sum is σ = 29961661184. Its totient is φ = 29498722560.

The previous prime is 29729890511. The next prime is 29729890627. The reversal of 29729890621 is 12609892792.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29729890621 - 2²⁷ = 29595672893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29729890627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51300 + ... + 249181.

It is an arithmetic number, because the mean of its divisors is an integer number (3745207648).

Almost surely, 2^29729890621 is an apocalyptic number.

It is an amenable number.

29729890621 is a deficient number, since it is larger than the sum of its proper divisors (231770563).

29729890621 is a wasteful number, since it uses less digits than its factorization.

29729890621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301251.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 29729890621 in words is "twenty-nine billion, seven hundred twenty-nine million, eight hundred ninety thousand, six hundred twenty-one".