30724819 has 2 divisors, whose sum is σ = 30724820. Its totient is φ = 30724818.

The previous prime is 30724801. The next prime is 30724823. The reversal of 30724819 is 91842703.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30724819 - 2⁵ = 30724787 is a prime.

It is a super-2 number, since 2×30724819² = 1888029005165522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30724829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15362409 + 15362410.

It is an arithmetic number, because the mean of its divisors is an integer number (15362410).

Almost surely, 2^30724819 is an apocalyptic number.

30724819 is a deficient number, since it is larger than the sum of its proper divisors (1).

30724819 is an equidigital number, since it uses as much as digits as its factorization.

30724819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 30724819 is about 5542.9972938835. The cubic root of 30724819 is about 313.2057869539.

The spelling of 30724819 in words is "thirty million, seven hundred twenty-four thousand, eight hundred nineteen".