161050639 has 4 divisors (see below), whose sum is σ = 170524224. Its totient is φ = 151577056.

The previous prime is 161050633. The next prime is 161050657. The reversal of 161050639 is 936050161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936050161 = 37 ⋅25298653.

It is a cyclic number.

It is not a de Polignac number, because 161050639 - 2⁵ = 161050607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161050639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161050633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4736767 + ... + 4736800.

It is an arithmetic number, because the mean of its divisors is an integer number (42631056).

Almost surely, 2^161050639 is an apocalyptic number.

161050639 is a deficient number, since it is larger than the sum of its proper divisors (9473585).

161050639 is an equidigital number, since it uses as much as digits as its factorization.

161050639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473584.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 161050639 is about 12690.5728397106. The cubic root of 161050639 is about 544.0692122417.

The spelling of 161050639 in words is "one hundred sixty-one million, fifty thousand, six hundred thirty-nine".