30894989 has 2 divisors, whose sum is σ = 30894990. Its totient is φ = 30894988.

The previous prime is 30894979. The next prime is 30895013. The reversal of 30894989 is 98949803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30614089 + 280900 = 5533^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 30894989 - 2²⁴ = 14117773 is a prime.

It is a Sophie Germain 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 (30894959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15447494 + 15447495.

It is an arithmetic number, because the mean of its divisors is an integer number (15447495).

Almost surely, 2^30894989 is an apocalyptic number.

It is an amenable number.

30894989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30894989 is an equidigital number, since it uses as much as digits as its factorization.

30894989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 30894989 is about 5558.3260969468. The cubic root of 30894989 is about 313.7829547984.

The spelling of 30894989 in words is "thirty million, eight hundred ninety-four thousand, nine hundred eighty-nine".