165025387 has 4 divisors (see below), whose sum is σ = 166212760. Its totient is φ = 163838016.

The previous prime is 165025379. The next prime is 165025417. The reversal of 165025387 is 783520561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165025387 - 2³ = 165025379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165025687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593478 + ... + 593755.

It is an arithmetic number, because the mean of its divisors is an integer number (41553190).

Almost surely, 2^165025387 is an apocalyptic number.

165025387 is a deficient number, since it is larger than the sum of its proper divisors (1187373).

165025387 is a wasteful number, since it uses less digits than its factorization.

165025387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187372.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 165025387 is about 12846.2207282920. The cubic root of 165025387 is about 548.5087836560.

The spelling of 165025387 in words is "one hundred sixty-five million, twenty-five thousand, three hundred eighty-seven".