29698421 has 4 divisors (see below), whose sum is σ = 29717292. Its totient is φ = 29679552.

The previous prime is 29698373. The next prime is 29698429. The reversal of 29698421 is 12489692.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4558225 + 25140196 = 2135^2 + 5014^2 .

It is a cyclic number.

It is not a de Polignac number, because 29698421 - 2¹⁰ = 29697397 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 (29698429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6836 + ... + 10301.

It is an arithmetic number, because the mean of its divisors is an integer number (7429323).

Almost surely, 2^29698421 is an apocalyptic number.

It is an amenable number.

29698421 is a deficient number, since it is larger than the sum of its proper divisors (18871).

29698421 is a wasteful number, since it uses less digits than its factorization.

29698421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18870.

The product of its digits is 62208, while the sum is 41.

The square root of 29698421 is about 5449.6257669679. The cubic root of 29698421 is about 309.6785464242.

The spelling of 29698421 in words is "twenty-nine million, six hundred ninety-eight thousand, four hundred twenty-one".