30701621 has 2 divisors, whose sum is σ = 30701622. Its totient is φ = 30701620.

The previous prime is 30701603. The next prime is 30701641. The reversal of 30701621 is 12610703.

It is a happy number.

It is an a-pointer prime, because the next prime (30701641) can be obtained adding 30701621 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29866225 + 835396 = 5465^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 30701621 - 2²² = 26507317 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30701593 and 30701602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30701641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15350810 + 15350811.

It is an arithmetic number, because the mean of its divisors is an integer number (15350811).

Almost surely, 2^30701621 is an apocalyptic number.

It is an amenable number.

30701621 is a deficient number, since it is larger than the sum of its proper divisors (1).

30701621 is an equidigital number, since it uses as much as digits as its factorization.

30701621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 30701621 is about 5540.9043485698. The cubic root of 30701621 is about 313.1269410626.

The spelling of 30701621 in words is "thirty million, seven hundred one thousand, six hundred twenty-one".