29499799621 has 2 divisors, whose sum is σ = 29499799622. Its totient is φ = 29499799620.

The previous prime is 29499799591. The next prime is 29499799633. The reversal of 29499799621 is 12699799492.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29484667521 + 15132100 = 171711^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 29499799621 - 2¹¹ = 29499797573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29499709621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14749899810 + 14749899811.

It is an arithmetic number, because the mean of its divisors is an integer number (14749899811).

Almost surely, 2^29499799621 is an apocalyptic number.

It is an amenable number.

29499799621 is a deficient number, since it is larger than the sum of its proper divisors (1).

29499799621 is an equidigital number, since it uses as much as digits as its factorization.

29499799621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39680928, while the sum is 67.

The spelling of 29499799621 in words is "twenty-nine billion, four hundred ninety-nine million, seven hundred ninety-nine thousand, six hundred twenty-one".