165989347 has 2 divisors, whose sum is σ = 165989348. Its totient is φ = 165989346.

The previous prime is 165989333. The next prime is 165989353. The reversal of 165989347 is 743989561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165989347 - 2¹⁵ = 165956579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165989294 and 165989303.

It is not a weakly prime, because it can be changed into another prime (165989387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82994673 + 82994674.

It is an arithmetic number, because the mean of its divisors is an integer number (82994674).

Almost surely, 2^165989347 is an apocalyptic number.

165989347 is a deficient number, since it is larger than the sum of its proper divisors (1).

165989347 is an equidigital number, since it uses as much as digits as its factorization.

165989347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 165989347 is about 12883.6853035147. The cubic root of 165989347 is about 549.5747092427.

The spelling of 165989347 in words is "one hundred sixty-five million, nine hundred eighty-nine thousand, three hundred forty-seven".