30476921 has 2 divisors, whose sum is σ = 30476922. Its totient is φ = 30476920.

The previous prime is 30476911. The next prime is 30476951. The reversal of 30476921 is 12967403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25351225 + 5125696 = 5035^2 + 2264^2 .

It is a cyclic number.

It is not a de Polignac number, because 30476921 - 2¹⁴ = 30460537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30476911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15238460 + 15238461.

It is an arithmetic number, because the mean of its divisors is an integer number (15238461).

Almost surely, 2^30476921 is an apocalyptic number.

It is an amenable number.

30476921 is a deficient number, since it is larger than the sum of its proper divisors (1).

30476921 is an equidigital number, since it uses as much as digits as its factorization.

30476921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 30476921 is about 5520.5906386908. The cubic root of 30476921 is about 312.3611620060.

The spelling of 30476921 in words is "thirty million, four hundred seventy-six thousand, nine hundred twenty-one".