165140407 has 2 divisors, whose sum is σ = 165140408. Its totient is φ = 165140406.

The previous prime is 165140399. The next prime is 165140429. The reversal of 165140407 is 704041561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165140407 - 2³ = 165140399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165140707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82570203 + 82570204.

It is an arithmetic number, because the mean of its divisors is an integer number (82570204).

Almost surely, 2^165140407 is an apocalyptic number.

165140407 is a deficient number, since it is larger than the sum of its proper divisors (1).

165140407 is an equidigital number, since it uses as much as digits as its factorization.

165140407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 165140407 is about 12850.6967515384. The cubic root of 165140407 is about 548.6361879495.

Adding to 165140407 its reverse (704041561), we get a palindrome (869181968).

The spelling of 165140407 in words is "one hundred sixty-five million, one hundred forty thousand, four hundred seven".