30102989 has 4 divisors (see below), whose sum is σ = 34403424. Its totient is φ = 25802556.

The previous prime is 30102959. The next prime is 30102991. The reversal of 30102989 is 98920103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30102989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30102959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150207 + ... + 2150220.

It is an arithmetic number, because the mean of its divisors is an integer number (8600856).

Almost surely, 2^30102989 is an apocalyptic number.

It is an amenable number.

30102989 is a deficient number, since it is larger than the sum of its proper divisors (4300435).

30102989 is an equidigital number, since it uses as much as digits as its factorization.

30102989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300434.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 30102989 is about 5486.6190864685. The cubic root of 30102989 is about 311.0784120064.

The spelling of 30102989 in words is "thirty million, one hundred two thousand, nine hundred eighty-nine".