161371783 has 2 divisors, whose sum is σ = 161371784. Its totient is φ = 161371782.

The previous prime is 161371759. The next prime is 161371789. The reversal of 161371783 is 387173161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161371783 - 2⁹ = 161371271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161371789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80685891 + 80685892.

It is an arithmetic number, because the mean of its divisors is an integer number (80685892).

Almost surely, 2^161371783 is an apocalyptic number.

161371783 is a deficient number, since it is larger than the sum of its proper divisors (1).

161371783 is an equidigital number, since it uses as much as digits as its factorization.

161371783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 37.

The square root of 161371783 is about 12703.2193950982. The cubic root of 161371783 is about 544.4306069678.

The spelling of 161371783 in words is "one hundred sixty-one million, three hundred seventy-one thousand, seven hundred eighty-three".