30990473 has 8 divisors (see below), whose sum is σ = 33945480. Its totient is φ = 28161280.

The previous prime is 30990419. The next prime is 30990493. The reversal of 30990473 is 37409903.

It can be written as a sum of positive squares in 4 ways, for example, as 18088009 + 12902464 = 4253^2 + 3592^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30990473 - 2⁶ = 30990409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30990403) 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 7 ways as a sum of consecutive naturals, for example, 30938 + ... + 31923.

It is an arithmetic number, because the mean of its divisors is an integer number (4243185).

Almost surely, 2^30990473 is an apocalyptic number.

It is an amenable number.

30990473 is a deficient number, since it is larger than the sum of its proper divisors (2955007).

30990473 is a wasteful number, since it uses less digits than its factorization.

30990473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62907.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30990473 is about 5566.9087472313. The cubic root of 30990473 is about 314.1058813683.

The spelling of 30990473 in words is "thirty million, nine hundred ninety thousand, four hundred seventy-three".