30406961 has 4 divisors (see below), whose sum is σ = 32745972. Its totient is φ = 28067952.

The previous prime is 30406951. The next prime is 30406969. The reversal of 30406961 is 16960403.

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 20421361 + 9985600 = 4519^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 30406961 - 2¹⁰ = 30405937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30406969) 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, 1169486 + ... + 1169511.

It is an arithmetic number, because the mean of its divisors is an integer number (8186493).

Almost surely, 2^30406961 is an apocalyptic number.

It is an amenable number.

30406961 is a deficient number, since it is larger than the sum of its proper divisors (2339011).

30406961 is a wasteful number, since it uses less digits than its factorization.

30406961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339010.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 30406961 is about 5514.2507197261. The cubic root of 30406961 is about 312.1219697624.

It can be divided in two parts, 3040 and 6961, that added together give a palindrome (10001).

The spelling of 30406961 in words is "thirty million, four hundred six thousand, nine hundred sixty-one".