389971501 has 2 divisors, whose sum is σ = 389971502. Its totient is φ = 389971500.

The previous prime is 389971489. The next prime is 389971507. The reversal of 389971501 is 105179983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357777225 + 32194276 = 18915^2 + 5674^2 .

It is a cyclic number.

It is not a de Polignac number, because 389971501 - 2¹⁵ = 389938733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389971507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194985750 + 194985751.

It is an arithmetic number, because the mean of its divisors is an integer number (194985751).

Almost surely, 2^389971501 is an apocalyptic number.

It is an amenable number.

389971501 is a deficient number, since it is larger than the sum of its proper divisors (1).

389971501 is an equidigital number, since it uses as much as digits as its factorization.

389971501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 389971501 is about 19747.6960934687. The cubic root of 389971501 is about 730.5965605808.

The spelling of 389971501 in words is "three hundred eighty-nine million, nine hundred seventy-one thousand, five hundred one".