30409081 has 4 divisors (see below), whose sum is σ = 31457700. Its totient is φ = 29360464.

The previous prime is 30409061. The next prime is 30409097. The reversal of 30409081 is 18090403.

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 20169081 + 10240000 = 4491^2 + 3200^2 .

It is a cyclic number.

It is not a de Polignac number, because 30409081 - 2¹³ = 30400889 is a prime.

It is a super-2 number, since 2×30409081² = 1849424414529122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30409031) 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, 524266 + ... + 524323.

It is an arithmetic number, because the mean of its divisors is an integer number (7864425).

Almost surely, 2^30409081 is an apocalyptic number.

It is an amenable number.

30409081 is a deficient number, since it is larger than the sum of its proper divisors (1048619).

30409081 is a wasteful number, since it uses less digits than its factorization.

30409081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048618.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 30409081 is about 5514.4429455748. The cubic root of 30409081 is about 312.1292233997.

Adding to 30409081 its reverse (18090403), we get a palindrome (48499484).

It can be divided in two parts, 3040 and 9081, that added together give a palindrome (12121).

The spelling of 30409081 in words is "thirty million, four hundred nine thousand, eighty-one".