30713905 has 8 divisors (see below), whose sum is σ = 36951912. Its totient is φ = 24507648.

The previous prime is 30713897. The next prime is 30713909. The reversal of 30713905 is 50931703.

It can be written as a sum of positive squares in 4 ways, for example, as 4016016 + 26697889 = 2004^2 + 5167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30713905 - 2³ = 30713897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30713909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5752 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (4618989).

Almost surely, 2^30713905 is an apocalyptic number.

It is an amenable number.

30713905 is a deficient number, since it is larger than the sum of its proper divisors (6238007).

30713905 is a wasteful number, since it uses less digits than its factorization.

30713905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15875.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 30713905 is about 5542.0127210247. The cubic root of 30713905 is about 313.1686971472.

The spelling of 30713905 in words is "thirty million, seven hundred thirteen thousand, nine hundred five".