387184661 has 2 divisors, whose sum is σ = 387184662. Its totient is φ = 387184660.

The previous prime is 387184643. The next prime is 387184729. The reversal of 387184661 is 166481783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331458436 + 55726225 = 18206^2 + 7465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387184661 is a prime.

It is a Chen prime.

It is equal to p_20688866 and since 387184661 and 20688866 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387184601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193592330 + 193592331.

It is an arithmetic number, because the mean of its divisors is an integer number (193592331).

Almost surely, 2^387184661 is an apocalyptic number.

It is an amenable number.

387184661 is a deficient number, since it is larger than the sum of its proper divisors (1).

387184661 is an equidigital number, since it uses as much as digits as its factorization.

387184661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 387184661 is about 19677.0084362436. The cubic root of 387184661 is about 728.8520526476.

The spelling of 387184661 in words is "three hundred eighty-seven million, one hundred eighty-four thousand, six hundred sixty-one".