390561547 has 2 divisors, whose sum is σ = 390561548. Its totient is φ = 390561546.

The previous prime is 390561517. The next prime is 390561571. The reversal of 390561547 is 745165093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390561547 - 2¹⁵ = 390528779 is a prime.

It is not a weakly prime, because it can be changed into another prime (390561517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195280773 + 195280774.

It is an arithmetic number, because the mean of its divisors is an integer number (195280774).

Almost surely, 2^390561547 is an apocalyptic number.

390561547 is a deficient number, since it is larger than the sum of its proper divisors (1).

390561547 is an equidigital number, since it uses as much as digits as its factorization.

390561547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 390561547 is about 19762.6300628231. The cubic root of 390561547 is about 730.9648510344.

The spelling of 390561547 in words is "three hundred ninety million, five hundred sixty-one thousand, five hundred forty-seven".