30789973 has 2 divisors, whose sum is σ = 30789974. Its totient is φ = 30789972.

The previous prime is 30789971. The next prime is 30789977. The reversal of 30789973 is 37998703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17114769 + 13675204 = 4137^2 + 3698^2 .

It is a cyclic number.

It is not a de Polignac number, because 30789973 - 2¹ = 30789971 is a prime.

Together with 30789971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30789971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15394986 + 15394987.

It is an arithmetic number, because the mean of its divisors is an integer number (15394987).

Almost surely, 2^30789973 is an apocalyptic number.

It is an amenable number.

30789973 is a deficient number, since it is larger than the sum of its proper divisors (1).

30789973 is an equidigital number, since it uses as much as digits as its factorization.

30789973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 30789973 is about 5548.8713266754. The cubic root of 30789973 is about 313.4270218053.

The spelling of 30789973 in words is "thirty million, seven hundred eighty-nine thousand, nine hundred seventy-three".