165401207 has 2 divisors, whose sum is σ = 165401208. Its totient is φ = 165401206.

The previous prime is 165401189. The next prime is 165401209. The reversal of 165401207 is 702104561.

It is a strong prime.

It is an emirp because it is prime and its reverse (702104561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165401207 - 2¹⁶ = 165335671 is a prime.

Together with 165401209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165401209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82700603 + 82700604.

It is an arithmetic number, because the mean of its divisors is an integer number (82700604).

Almost surely, 2^165401207 is an apocalyptic number.

165401207 is a deficient number, since it is larger than the sum of its proper divisors (1).

165401207 is an equidigital number, since it uses as much as digits as its factorization.

165401207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 165401207 is about 12860.8400580988. The cubic root of 165401207 is about 548.9248495071.

Adding to 165401207 its reverse (702104561), we get a palindrome (867505768).

The spelling of 165401207 in words is "one hundred sixty-five million, four hundred one thousand, two hundred seven".