30720007 has 2 divisors, whose sum is σ = 30720008. Its totient is φ = 30720006.

The previous prime is 30719987. The next prime is 30720013. The reversal of 30720007 is 70002703.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30720007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30720097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15360003 + 15360004.

It is an arithmetic number, because the mean of its divisors is an integer number (15360004).

Almost surely, 2^30720007 is an apocalyptic number.

30720007 is a deficient number, since it is larger than the sum of its proper divisors (1).

30720007 is an equidigital number, since it uses as much as digits as its factorization.

30720007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294, while the sum is 19.

The square root of 30720007 is about 5542.5632156972. The cubic root of 30720007 is about 313.1894350818.

The spelling of 30720007 in words is "thirty million, seven hundred twenty thousand, seven".