30129019 has 2 divisors, whose sum is σ = 30129020. Its totient is φ = 30129018.

The previous prime is 30128957. The next prime is 30129023. The reversal of 30129019 is 91092103.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30129019 is a prime.

It is a super-2 number, since 2×30129019² = 1815515571804722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30128984 and 30129002.

It is not a weakly prime, because it can be changed into another prime (30129089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15064509 + 15064510.

It is an arithmetic number, because the mean of its divisors is an integer number (15064510).

Almost surely, 2^30129019 is an apocalyptic number.

30129019 is a deficient number, since it is larger than the sum of its proper divisors (1).

30129019 is an equidigital number, since it uses as much as digits as its factorization.

30129019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 30129019 is about 5488.9907086822. The cubic root of 30129019 is about 311.1680491546.

The spelling of 30129019 in words is "thirty million, one hundred twenty-nine thousand, nineteen".