30729313 has 4 divisors (see below), whose sum is σ = 30935700. Its totient is φ = 30522928.

The previous prime is 30729253. The next prime is 30729337. The reversal of 30729313 is 31392703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19918369 + 10810944 = 4463^2 + 3288^2 .

It is a cyclic number.

It is not a de Polignac number, because 30729313 - 2²¹ = 28632161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30729343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102970 + ... + 103267.

It is an arithmetic number, because the mean of its divisors is an integer number (7733925).

Almost surely, 2^30729313 is an apocalyptic number.

It is an amenable number.

30729313 is a deficient number, since it is larger than the sum of its proper divisors (206387).

30729313 is a wasteful number, since it uses less digits than its factorization.

30729313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206386.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 30729313 is about 5543.4026554094. The cubic root of 30729313 is about 313.2210566743.

The spelling of 30729313 in words is "thirty million, seven hundred twenty-nine thousand, three hundred thirteen".