161474773 has 2 divisors, whose sum is σ = 161474774. Its totient is φ = 161474772.

The previous prime is 161474767. The next prime is 161474791. The reversal of 161474773 is 377474161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120604324 + 40870449 = 10982^2 + 6393^2 .

It is a cyclic number.

It is not a de Polignac number, because 161474773 - 2⁵ = 161474741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161474723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80737386 + 80737387.

It is an arithmetic number, because the mean of its divisors is an integer number (80737387).

Almost surely, 2^161474773 is an apocalyptic number.

It is an amenable number.

161474773 is a deficient number, since it is larger than the sum of its proper divisors (1).

161474773 is an equidigital number, since it uses as much as digits as its factorization.

161474773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 40.

The square root of 161474773 is about 12707.2724453362. The cubic root of 161474773 is about 544.5464037177.

The spelling of 161474773 in words is "one hundred sixty-one million, four hundred seventy-four thousand, seven hundred seventy-three".