30145477 has 2 divisors, whose sum is σ = 30145478. Its totient is φ = 30145476.

The previous prime is 30145469. The next prime is 30145481. The reversal of 30145477 is 77454103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19589476 + 10556001 = 4426^2 + 3249^2 .

It is an emirp because it is prime and its reverse (77454103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30145477 - 2³ = 30145469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30145447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15072738 + 15072739.

It is an arithmetic number, because the mean of its divisors is an integer number (15072739).

Almost surely, 2^30145477 is an apocalyptic number.

It is an amenable number.

30145477 is a deficient number, since it is larger than the sum of its proper divisors (1).

30145477 is an equidigital number, since it uses as much as digits as its factorization.

30145477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 30145477 is about 5490.4896867219. The cubic root of 30145477 is about 311.2246974372.

The spelling of 30145477 in words is "thirty million, one hundred forty-five thousand, four hundred seventy-seven".