30149247 has 4 divisors (see below), whose sum is σ = 40199000. Its totient is φ = 20099496.

The previous prime is 30149237. The next prime is 30149261. The reversal of 30149247 is 74294103.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30149247 - 2¹¹ = 30147199 is a prime.

It is a super-3 number, since 3×30149247³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30149237) 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, 5024872 + ... + 5024877.

It is an arithmetic number, because the mean of its divisors is an integer number (10049750).

Almost surely, 2^30149247 is an apocalyptic number.

30149247 is a deficient number, since it is larger than the sum of its proper divisors (10049753).

30149247 is a wasteful number, since it uses less digits than its factorization.

30149247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10049752.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 30149247 is about 5490.8329969140. The cubic root of 30149247 is about 311.2376708395.

The spelling of 30149247 in words is "thirty million, one hundred forty-nine thousand, two hundred forty-seven".