29638901 has 4 divisors (see below), whose sum is σ = 29660832. Its totient is φ = 29616972.

The previous prime is 29638891. The next prime is 29638907. The reversal of 29638901 is 10983692.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29638901 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29638907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8795 + ... + 11688.

It is an arithmetic number, because the mean of its divisors is an integer number (7415208).

Almost surely, 2^29638901 is an apocalyptic number.

It is an amenable number.

29638901 is a deficient number, since it is larger than the sum of its proper divisors (21931).

29638901 is a wasteful number, since it uses less digits than its factorization.

29638901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21930.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 29638901 is about 5444.1621026564. The cubic root of 29638901 is about 309.4715276252.

The spelling of 29638901 in words is "twenty-nine million, six hundred thirty-eight thousand, nine hundred one".