30461891 has 2 divisors, whose sum is σ = 30461892. Its totient is φ = 30461890.

The previous prime is 30461863. The next prime is 30461897. The reversal of 30461891 is 19816403.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30461891 is a prime.

It is equal to p_1884713 and since 30461891 and 1884713 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (30461897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15230945 + 15230946.

It is an arithmetic number, because the mean of its divisors is an integer number (15230946).

Almost surely, 2^30461891 is an apocalyptic number.

30461891 is a deficient number, since it is larger than the sum of its proper divisors (1).

30461891 is an equidigital number, since it uses as much as digits as its factorization.

30461891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 30461891 is about 5519.2292034305. The cubic root of 30461891 is about 312.3098055469.

The spelling of 30461891 in words is "thirty million, four hundred sixty-one thousand, eight hundred ninety-one".