389653997 has 2 divisors, whose sum is σ = 389653998. Its totient is φ = 389653996.

The previous prime is 389653981. The next prime is 389654009. The reversal of 389653997 is 799356983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261986596 + 127667401 = 16186^2 + 11299^2 .

It is a cyclic number.

It is not a de Polignac number, because 389653997 - 2⁴ = 389653981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389653597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194826998 + 194826999.

It is an arithmetic number, because the mean of its divisors is an integer number (194826999).

Almost surely, 2^389653997 is an apocalyptic number.

It is an amenable number.

389653997 is a deficient number, since it is larger than the sum of its proper divisors (1).

389653997 is an equidigital number, since it uses as much as digits as its factorization.

389653997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11022480, while the sum is 59.

The square root of 389653997 is about 19739.6554427883. The cubic root of 389653997 is about 730.3982295814.

The spelling of 389653997 in words is "three hundred eighty-nine million, six hundred fifty-three thousand, nine hundred ninety-seven".