30724399 has 2 divisors, whose sum is σ = 30724400. Its totient is φ = 30724398.

The previous prime is 30724339. The next prime is 30724409. The reversal of 30724399 is 99342703.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30724399 - 2¹⁷ = 30593327 is a prime.

It is a super-2 number, since 2×30724399² = 1887977387822402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30724339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15362199 + 15362200.

It is an arithmetic number, because the mean of its divisors is an integer number (15362200).

Almost surely, 2^30724399 is an apocalyptic number.

30724399 is a deficient number, since it is larger than the sum of its proper divisors (1).

30724399 is an equidigital number, since it uses as much as digits as its factorization.

30724399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 30724399 is about 5542.9594081140. The cubic root of 30724399 is about 313.2043598011.

The spelling of 30724399 in words is "thirty million, seven hundred twenty-four thousand, three hundred ninety-nine".