30129479 has 2 divisors, whose sum is σ = 30129480. Its totient is φ = 30129478.

The previous prime is 30129469. The next prime is 30129481. The reversal of 30129479 is 97492103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30129479 - 2¹² = 30125383 is a prime.

It is a super-2 number, since 2×30129479² = 1815571009622882, which contains 22 as substring.

Together with 30129481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30129469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15064739 + 15064740.

It is an arithmetic number, because the mean of its divisors is an integer number (15064740).

Almost surely, 2^30129479 is an apocalyptic number.

30129479 is a deficient number, since it is larger than the sum of its proper divisors (1).

30129479 is an equidigital number, since it uses as much as digits as its factorization.

30129479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 30129479 is about 5489.0326105790. The cubic root of 30129479 is about 311.1696327505.

The spelling of 30129479 in words is "thirty million, one hundred twenty-nine thousand, four hundred seventy-nine".