391380628087 has 2 divisors, whose sum is σ = 391380628088. Its totient is φ = 391380628086.

The previous prime is 391380628073. The next prime is 391380628097. The reversal of 391380628087 is 780826083193.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391380628087 is a prime.

It is a super-2 number, since 2×391380628087² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391380628027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195690314043 + 195690314044.

It is an arithmetic number, because the mean of its divisors is an integer number (195690314044).

Almost surely, 2^391380628087 is an apocalyptic number.

391380628087 is a deficient number, since it is larger than the sum of its proper divisors (1).

391380628087 is an equidigital number, since it uses as much as digits as its factorization.

391380628087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 391380628087 in words is "three hundred ninety-one billion, three hundred eighty million, six hundred twenty-eight thousand, eighty-seven".