30125979 has 16 divisors (see below), whose sum is σ = 48064800. Its totient is φ = 18538848.

The previous prime is 30125971. The next prime is 30125981. The reversal of 30125979 is 97952103.

It is not a de Polignac number, because 30125979 - 2³ = 30125971 is a prime.

It is a super-2 number, since 2×30125979² = 1815149221416882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30125971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42564 + ... + 43265.

It is an arithmetic number, because the mean of its divisors is an integer number (3004050).

Almost surely, 2^30125979 is an apocalyptic number.

30125979 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

30125979 is a deficient number, since it is larger than the sum of its proper divisors (17938821).

30125979 is a wasteful number, since it uses less digits than its factorization.

30125979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85851 (or 85845 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 30125979 is about 5488.7137837566. The cubic root of 30125979 is about 311.1575832459.

The spelling of 30125979 in words is "thirty million, one hundred twenty-five thousand, nine hundred seventy-nine".