30129473 has 4 divisors (see below), whose sum is σ = 32868528. Its totient is φ = 27390420.

The previous prime is 30129469. The next prime is 30129479. The reversal of 30129473 is 37492103.

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 30129473 - 2² = 30129469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30129479) 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, 1369511 + ... + 1369532.

It is an arithmetic number, because the mean of its divisors is an integer number (8217132).

Almost surely, 2^30129473 is an apocalyptic number.

It is an amenable number.

30129473 is a deficient number, since it is larger than the sum of its proper divisors (2739055).

30129473 is a wasteful number, since it uses less digits than its factorization.

30129473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739054.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 30129473 is about 5489.0320640346. The cubic root of 30129473 is about 311.1696120950.

The spelling of 30129473 in words is "thirty million, one hundred twenty-nine thousand, four hundred seventy-three".