161266733 has 2 divisors, whose sum is σ = 161266734. Its totient is φ = 161266732.

The previous prime is 161266717. The next prime is 161266739. The reversal of 161266733 is 337662161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105719524 + 55547209 = 10282^2 + 7453^2 .

It is a cyclic number.

It is not a de Polignac number, because 161266733 - 2⁴ = 161266717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161266693 and 161266702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161266739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80633366 + 80633367.

It is an arithmetic number, because the mean of its divisors is an integer number (80633367).

Almost surely, 2^161266733 is an apocalyptic number.

It is an amenable number.

161266733 is a deficient number, since it is larger than the sum of its proper divisors (1).

161266733 is an equidigital number, since it uses as much as digits as its factorization.

161266733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 161266733 is about 12699.0839433402. The cubic root of 161266733 is about 544.3124432899.

The spelling of 161266733 in words is "one hundred sixty-one million, two hundred sixty-six thousand, seven hundred thirty-three".