161226743 has 2 divisors, whose sum is σ = 161226744. Its totient is φ = 161226742.

The previous prime is 161226739. The next prime is 161226787. The reversal of 161226743 is 347622161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161226743 - 2² = 161226739 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161226713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80613371 + 80613372.

It is an arithmetic number, because the mean of its divisors is an integer number (80613372).

Almost surely, 2^161226743 is an apocalyptic number.

161226743 is a deficient number, since it is larger than the sum of its proper divisors (1).

161226743 is an equidigital number, since it uses as much as digits as its factorization.

161226743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 161226743 is about 12697.5093226979. The cubic root of 161226743 is about 544.2674477440.

The spelling of 161226743 in words is "one hundred sixty-one million, two hundred twenty-six thousand, seven hundred forty-three".