30407989 has 2 divisors, whose sum is σ = 30407990. Its totient is φ = 30407988.

The previous prime is 30407981. The next prime is 30408041. The reversal of 30407989 is 98970403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29322225 + 1085764 = 5415^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 30407989 - 2³ = 30407981 is a prime.

It is equal to p_1881679 and since 30407989 and 1881679 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30407981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15203994 + 15203995.

It is an arithmetic number, because the mean of its divisors is an integer number (15203995).

Almost surely, 2^30407989 is an apocalyptic number.

It is an amenable number.

30407989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30407989 is an equidigital number, since it uses as much as digits as its factorization.

30407989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 30407989 is about 5514.3439319651. The cubic root of 30407989 is about 312.1254871343.

The spelling of 30407989 in words is "thirty million, four hundred seven thousand, nine hundred eighty-nine".