161153959 has 4 divisors (see below), whose sum is σ = 162313480. Its totient is φ = 159994440.

The previous prime is 161153911. The next prime is 161153963. The reversal of 161153959 is 959351161.

161153959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 959351161 = 7321 ⋅131041.

It is a cyclic number.

It is not a de Polignac number, because 161153959 - 2²³ = 152765351 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 (161153969) 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, 579552 + ... + 579829.

It is an arithmetic number, because the mean of its divisors is an integer number (40578370).

Almost surely, 2^161153959 is an apocalyptic number.

161153959 is a deficient number, since it is larger than the sum of its proper divisors (1159521).

161153959 is a wasteful number, since it uses less digits than its factorization.

161153959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159520.

The product of its digits is 36450, while the sum is 40.

The square root of 161153959 is about 12694.6429252658. The cubic root of 161153959 is about 544.1855342769.

The spelling of 161153959 in words is "one hundred sixty-one million, one hundred fifty-three thousand, nine hundred fifty-nine".