30400129 has 4 divisors (see below), whose sum is σ = 30429184. Its totient is φ = 30371076.

The previous prime is 30400127. The next prime is 30400159. The reversal of 30400129 is 92100403.

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 not a de Polignac number, because 30400129 - 2¹ = 30400127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30400127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12897 + ... + 15070.

It is an arithmetic number, because the mean of its divisors is an integer number (7607296).

Almost surely, 2^30400129 is an apocalyptic number.

It is an amenable number.

30400129 is a deficient number, since it is larger than the sum of its proper divisors (29055).

30400129 is a wasteful number, since it uses less digits than its factorization.

30400129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29054.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30400129 is about 5513.6311991282. The cubic root of 30400129 is about 312.0985915956.

The spelling of 30400129 in words is "thirty million, four hundred thousand, one hundred twenty-nine".