391674132077 has 2 divisors, whose sum is σ = 391674132078. Its totient is φ = 391674132076.

The previous prime is 391674132053. The next prime is 391674132103. The reversal of 391674132077 is 770231476193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363680157481 + 27993974596 = 603059^2 + 167314^2 .

It is a cyclic number.

It is not a de Polignac number, because 391674132077 - 2⁶ = 391674132013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391674132677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195837066038 + 195837066039.

It is an arithmetic number, because the mean of its divisors is an integer number (195837066039).

Almost surely, 2^391674132077 is an apocalyptic number.

It is an amenable number.

391674132077 is a deficient number, since it is larger than the sum of its proper divisors (1).

391674132077 is an equidigital number, since it uses as much as digits as its factorization.

391674132077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 50.

The spelling of 391674132077 in words is "three hundred ninety-one billion, six hundred seventy-four million, one hundred thirty-two thousand, seventy-seven".