30101989 has 4 divisors (see below), whose sum is σ = 30383424. Its totient is φ = 29820556.

The previous prime is 30101983. The next prime is 30101993. The reversal of 30101989 is 98910103.

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 not a de Polignac number, because 30101989 - 2¹³ = 30093797 is a prime.

It is a super-2 number, since 2×30101989² = 1812259483512242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30101989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30101983) 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, 140557 + ... + 140770.

It is an arithmetic number, because the mean of its divisors is an integer number (7595856).

Almost surely, 2^30101989 is an apocalyptic number.

It is an amenable number.

30101989 is a deficient number, since it is larger than the sum of its proper divisors (281435).

30101989 is a wasteful number, since it uses less digits than its factorization.

30101989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281434.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 30101989 is about 5486.5279549092. The cubic root of 30101989 is about 311.0749673667.

The spelling of 30101989 in words is "thirty million, one hundred one thousand, nine hundred eighty-nine".