30749305 has 4 divisors (see below), whose sum is σ = 36899172. Its totient is φ = 24599440.

The previous prime is 30749297. The next prime is 30749347. The reversal of 30749305 is 50394703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50394703 = 37 ⋅1362019.

It can be written as a sum of positive squares in 2 ways, for example, as 19114384 + 11634921 = 4372^2 + 3411^2 .

It is not a de Polignac number, because 30749305 - 2³ = 30749297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074926 + ... + 3074935.

It is an arithmetic number, because the mean of its divisors is an integer number (9224793).

Almost surely, 2^30749305 is an apocalyptic number.

It is an amenable number.

30749305 is a deficient number, since it is larger than the sum of its proper divisors (6149867).

30749305 is an equidigital number, since it uses as much as digits as its factorization.

30749305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149866.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 30749305 is about 5545.2055868110. The cubic root of 30749305 is about 313.2889674873.

The spelling of 30749305 in words is "thirty million, seven hundred forty-nine thousand, three hundred five".