387619397497 has 2 divisors, whose sum is σ = 387619397498. Its totient is φ = 387619397496.

The previous prime is 387619397491. The next prime is 387619397549. The reversal of 387619397497 is 794793916783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384692695696 + 2926701801 = 620236^2 + 54099^2 .

It is an emirp because it is prime and its reverse (794793916783) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387619397497 is a prime.

It is not a weakly prime, because it can be changed into another prime (387619397491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193809698748 + 193809698749.

It is an arithmetic number, because the mean of its divisors is an integer number (193809698749).

Almost surely, 2^387619397497 is an apocalyptic number.

It is an amenable number.

387619397497 is a deficient number, since it is larger than the sum of its proper divisors (1).

387619397497 is an equidigital number, since it uses as much as digits as its factorization.

387619397497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432081216, while the sum is 73.

The spelling of 387619397497 in words is "three hundred eighty-seven billion, six hundred nineteen million, three hundred ninety-seven thousand, four hundred ninety-seven".