30149989 has 2 divisors, whose sum is σ = 30149990. Its totient is φ = 30149988.

The previous prime is 30149969. The next prime is 30150007. The reversal of 30149989 is 98994103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16769025 + 13380964 = 4095^2 + 3658^2 .

It is a cyclic number.

It is not a de Polignac number, because 30149989 - 2⁵ = 30149957 is a prime.

It is a super-3 number, since 3×30149989³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30149969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15074994 + 15074995.

It is an arithmetic number, because the mean of its divisors is an integer number (15074995).

Almost surely, 2^30149989 is an apocalyptic number.

It is an amenable number.

30149989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30149989 is an equidigital number, since it uses as much as digits as its factorization.

30149989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 30149989 is about 5490.9005636598. The cubic root of 30149989 is about 311.2402240979.

The spelling of 30149989 in words is "thirty million, one hundred forty-nine thousand, nine hundred eighty-nine".