30699729 has 10 divisors (see below), whose sum is σ = 45860210. Its totient is φ = 20466432.

The previous prime is 30699701. The next prime is 30699731. The reversal of 30699729 is 92799603.

It can be written as a sum of positive squares in only one way, i.e., 30636225 + 63504 = 5535^2 + 252^2 .

It is not a de Polignac number, because 30699729 - 2⁹ = 30699217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30699769) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 189424 + ... + 189585.

It is an arithmetic number, because the mean of its divisors is an integer number (4586021).

Almost surely, 2^30699729 is an apocalyptic number.

It is an amenable number.

30699729 is a deficient number, since it is larger than the sum of its proper divisors (15160481).

30699729 is an equidigital number, since it uses as much as digits as its factorization.

30699729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379021 (or 379012 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 30699729 is about 5540.7336156866. The cubic root of 30699729 is about 313.1205087383.

The spelling of 30699729 in words is "thirty million, six hundred ninety-nine thousand, seven hundred twenty-nine".