161529539 has 2 divisors, whose sum is σ = 161529540. Its totient is φ = 161529538.

The previous prime is 161529517. The next prime is 161529587. The reversal of 161529539 is 935925161.

It is a happy number.

161529539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161529539 - 2⁸ = 161529283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161529496 and 161529505.

It is not a weakly prime, because it can be changed into another prime (161529239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80764769 + 80764770.

It is an arithmetic number, because the mean of its divisors is an integer number (80764770).

Almost surely, 2^161529539 is an apocalyptic number.

161529539 is a deficient number, since it is larger than the sum of its proper divisors (1).

161529539 is an equidigital number, since it uses as much as digits as its factorization.

161529539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 41.

The square root of 161529539 is about 12709.4271704117. The cubic root of 161529539 is about 544.6079597880.

The spelling of 161529539 in words is "one hundred sixty-one million, five hundred twenty-nine thousand, five hundred thirty-nine".