161860403 has 2 divisors, whose sum is σ = 161860404. Its totient is φ = 161860402.

The previous prime is 161860367. The next prime is 161860481. The reversal of 161860403 is 304068161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161860403 - 2¹⁴ = 161844019 is a prime.

It is not a weakly prime, because it can be changed into another prime (161860003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80930201 + 80930202.

It is an arithmetic number, because the mean of its divisors is an integer number (80930202).

Almost surely, 2^161860403 is an apocalyptic number.

161860403 is a deficient number, since it is larger than the sum of its proper divisors (1).

161860403 is an equidigital number, since it uses as much as digits as its factorization.

161860403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 161860403 is about 12722.4369913944. The cubic root of 161860403 is about 544.9795497755.

The spelling of 161860403 in words is "one hundred sixty-one million, eight hundred sixty thousand, four hundred three".