30147919 has 4 divisors (see below), whose sum is σ = 31921344. Its totient is φ = 28374496.

The previous prime is 30147913. The next prime is 30147961. The reversal of 30147919 is 91974103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91974103 = 13 ⋅7074931.

It is not a de Polignac number, because 30147919 - 2¹³ = 30139727 is a prime.

It is a super-2 number, since 2×30147919² = 1817794040061122, which contains 22 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 (30147913) 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, 886687 + ... + 886720.

It is an arithmetic number, because the mean of its divisors is an integer number (7980336).

Almost surely, 2^30147919 is an apocalyptic number.

30147919 is a deficient number, since it is larger than the sum of its proper divisors (1773425).

30147919 is a wasteful number, since it uses less digits than its factorization.

30147919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773424.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 30147919 is about 5490.7120667542. The cubic root of 30147919 is about 311.2331010217.

The spelling of 30147919 in words is "thirty million, one hundred forty-seven thousand, nine hundred nineteen".