389786797 has 2 divisors, whose sum is σ = 389786798. Its totient is φ = 389786796.

The previous prime is 389786779. The next prime is 389786807. The reversal of 389786797 is 797687983.

Together with previous prime (389786779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372721636 + 17065161 = 19306^2 + 4131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389786797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389786597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194893398 + 194893399.

It is an arithmetic number, because the mean of its divisors is an integer number (194893399).

Almost surely, 2^389786797 is an apocalyptic number.

It is an amenable number.

389786797 is a deficient number, since it is larger than the sum of its proper divisors (1).

389786797 is an equidigital number, since it uses as much as digits as its factorization.

389786797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32006016, while the sum is 64.

The square root of 389786797 is about 19743.0189434139. The cubic root of 389786797 is about 730.4811970931.

The spelling of 389786797 in words is "three hundred eighty-nine million, seven hundred eighty-six thousand, seven hundred ninety-seven".