161051389 has 4 divisors (see below), whose sum is σ = 161693280. Its totient is φ = 160409500.

The previous prime is 161051381. The next prime is 161051393. The reversal of 161051389 is 983150161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161051389 - 2³ = 161051381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161051381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320569 + ... + 321070.

It is an arithmetic number, because the mean of its divisors is an integer number (40423320).

Almost surely, 2^161051389 is an apocalyptic number.

It is an amenable number.

161051389 is a deficient number, since it is larger than the sum of its proper divisors (641891).

161051389 is an equidigital number, since it uses as much as digits as its factorization.

161051389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641890.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 161051389 is about 12690.6023891697. The cubic root of 161051389 is about 544.0700568027.

The spelling of 161051389 in words is "one hundred sixty-one million, fifty-one thousand, three hundred eighty-nine".