30540749 has 2 divisors, whose sum is σ = 30540750. Its totient is φ = 30540748.

The previous prime is 30540743. The next prime is 30540817. The reversal of 30540749 is 94704503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 3396649 = 5210^2 + 1843^2 .

It is an emirp because it is prime and its reverse (94704503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30540749 - 2⁸ = 30540493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30540743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15270374 + 15270375.

It is an arithmetic number, because the mean of its divisors is an integer number (15270375).

Almost surely, 2^30540749 is an apocalyptic number.

It is an amenable number.

30540749 is a deficient number, since it is larger than the sum of its proper divisors (1).

30540749 is an equidigital number, since it uses as much as digits as its factorization.

30540749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 30540749 is about 5526.3685182948. The cubic root of 30540749 is about 312.5790699117.

The spelling of 30540749 in words is "thirty million, five hundred forty thousand, seven hundred forty-nine".