161248939 has 2 divisors, whose sum is σ = 161248940. Its totient is φ = 161248938.

The previous prime is 161248937. The next prime is 161248951. The reversal of 161248939 is 939842161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161248939 - 2¹ = 161248937 is a prime.

Together with 161248937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 161248895 and 161248904.

It is not a weakly prime, because it can be changed into another prime (161248937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80624469 + 80624470.

It is an arithmetic number, because the mean of its divisors is an integer number (80624470).

Almost surely, 2^161248939 is an apocalyptic number.

161248939 is a deficient number, since it is larger than the sum of its proper divisors (1).

161248939 is an equidigital number, since it uses as much as digits as its factorization.

161248939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 161248939 is about 12698.3833222974. The cubic root of 161248939 is about 544.2924229346.

The spelling of 161248939 in words is "one hundred sixty-one million, two hundred forty-eight thousand, nine hundred thirty-nine".