387654187121 has 2 divisors, whose sum is σ = 387654187122. Its totient is φ = 387654187120.

The previous prime is 387654187061. The next prime is 387654187139. The reversal of 387654187121 is 121781456783.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278083256896 + 109570930225 = 527336^2 + 331015^2 .

It is a cyclic number.

It is not a de Polignac number, because 387654187121 - 2⁶ = 387654187057 is a prime.

It is not a weakly prime, because it can be changed into another prime (387654187181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193827093560 + 193827093561.

It is an arithmetic number, because the mean of its divisors is an integer number (193827093561).

Almost surely, 2^387654187121 is an apocalyptic number.

It is an amenable number.

387654187121 is a deficient number, since it is larger than the sum of its proper divisors (1).

387654187121 is an equidigital number, since it uses as much as digits as its factorization.

387654187121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 53.

The spelling of 387654187121 in words is "three hundred eighty-seven billion, six hundred fifty-four million, one hundred eighty-seven thousand, one hundred twenty-one".