389621747 has 2 divisors, whose sum is σ = 389621748. Its totient is φ = 389621746.

The previous prime is 389621737. The next prime is 389621761. The reversal of 389621747 is 747126983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389621747 - 2²⁴ = 372844531 is a prime.

It is not a weakly prime, because it can be changed into another prime (389621707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194810873 + 194810874.

It is an arithmetic number, because the mean of its divisors is an integer number (194810874).

Almost surely, 2^389621747 is an apocalyptic number.

389621747 is a deficient number, since it is larger than the sum of its proper divisors (1).

389621747 is an equidigital number, since it uses as much as digits as its factorization.

389621747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 389621747 is about 19738.8385423256. The cubic root of 389621747 is about 730.3780783763.

The spelling of 389621747 in words is "three hundred eighty-nine million, six hundred twenty-one thousand, seven hundred forty-seven".