30140249 has 4 divisors (see below), whose sum is σ = 30152064. Its totient is φ = 30128436.

The previous prime is 30140239. The next prime is 30140321. The reversal of 30140249 is 94204103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30140249 - 2²⁴ = 13363033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30140219) 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, 317 + ... + 7770.

It is an arithmetic number, because the mean of its divisors is an integer number (7538016).

Almost surely, 2^30140249 is an apocalyptic number.

It is an amenable number.

30140249 is a deficient number, since it is larger than the sum of its proper divisors (11815).

30140249 is an equidigital number, since it uses as much as digits as its factorization.

30140249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11814.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30140249 is about 5490.0135701107. The cubic root of 30140249 is about 311.2067049449.

The spelling of 30140249 in words is "thirty million, one hundred forty thousand, two hundred forty-nine".