161338547 has 2 divisors, whose sum is σ = 161338548. Its totient is φ = 161338546.

The previous prime is 161338531. The next prime is 161338561. The reversal of 161338547 is 745833161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161338547 - 2⁴ = 161338531 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161338547.

It is not a weakly prime, because it can be changed into another prime (161338147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80669273 + 80669274.

It is an arithmetic number, because the mean of its divisors is an integer number (80669274).

Almost surely, 2^161338547 is an apocalyptic number.

161338547 is a deficient number, since it is larger than the sum of its proper divisors (1).

161338547 is an equidigital number, since it uses as much as digits as its factorization.

161338547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 161338547 is about 12701.9111554128. The cubic root of 161338547 is about 544.3932275745.

The spelling of 161338547 in words is "one hundred sixty-one million, three hundred thirty-eight thousand, five hundred forty-seven".