391488067 has 2 divisors, whose sum is σ = 391488068. Its totient is φ = 391488066.

The previous prime is 391488047. The next prime is 391488077. The reversal of 391488067 is 760884193.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 391488067 - 2¹¹ = 391486019 is a prime.

It is not a weakly prime, because it can be changed into another prime (391488017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195744033 + 195744034.

It is an arithmetic number, because the mean of its divisors is an integer number (195744034).

Almost surely, 2^391488067 is an apocalyptic number.

391488067 is a deficient number, since it is larger than the sum of its proper divisors (1).

391488067 is an equidigital number, since it uses as much as digits as its factorization.

391488067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 391488067 is about 19786.0573889797. The cubic root of 391488067 is about 731.5424114892.

The spelling of 391488067 in words is "three hundred ninety-one million, four hundred eighty-eight thousand, sixty-seven".