30724997 has 2 divisors, whose sum is σ = 30724998. Its totient is φ = 30724996.

The previous prime is 30724979. The next prime is 30725047. The reversal of 30724997 is 79942703.

Together with previous prime (30724979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17757796 + 12967201 = 4214^2 + 3601^2 .

It is a cyclic number.

It is not a de Polignac number, because 30724997 - 2⁸ = 30724741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30724597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15362498 + 15362499.

It is an arithmetic number, because the mean of its divisors is an integer number (15362499).

Almost surely, 2^30724997 is an apocalyptic number.

It is an amenable number.

30724997 is a deficient number, since it is larger than the sum of its proper divisors (1).

30724997 is an equidigital number, since it uses as much as digits as its factorization.

30724997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 30724997 is about 5543.0133501553. The cubic root of 30724997 is about 313.2063917909.

The spelling of 30724997 in words is "thirty million, seven hundred twenty-four thousand, nine hundred ninety-seven".