30097421 has 2 divisors, whose sum is σ = 30097422. Its totient is φ = 30097420.

The previous prime is 30097399. The next prime is 30097427. The reversal of 30097421 is 12479003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30096196 + 1225 = 5486^2 + 35^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30097421 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30097427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15048710 + 15048711.

It is an arithmetic number, because the mean of its divisors is an integer number (15048711).

Almost surely, 2^30097421 is an apocalyptic number.

It is an amenable number.

30097421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30097421 is an equidigital number, since it uses as much as digits as its factorization.

30097421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 30097421 is about 5486.1116466948. Note that the first 3 decimals coincide. The cubic root of 30097421 is about 311.0592312821.

The spelling of 30097421 in words is "thirty million, ninety-seven thousand, four hundred twenty-one".