30421901 has 2 divisors, whose sum is σ = 30421902. Its totient is φ = 30421900.

The previous prime is 30421871. The next prime is 30421921. The reversal of 30421901 is 10912403.

It is an a-pointer prime, because the next prime (30421921) can be obtained adding 30421901 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 2172676 = 5315^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 30421901 - 2¹⁰ = 30420877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30421921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210950 + 15210951.

It is an arithmetic number, because the mean of its divisors is an integer number (15210951).

Almost surely, 2^30421901 is an apocalyptic number.

It is an amenable number.

30421901 is a deficient number, since it is larger than the sum of its proper divisors (1).

30421901 is an equidigital number, since it uses as much as digits as its factorization.

30421901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 30421901 is about 5515.6052251770. The cubic root of 30421901 is about 312.1730801943.

The spelling of 30421901 in words is "thirty million, four hundred twenty-one thousand, nine hundred one".