161378927 has 2 divisors, whose sum is σ = 161378928. Its totient is φ = 161378926.

The previous prime is 161378891. The next prime is 161379007. The reversal of 161378927 is 729873161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161378927 - 2¹⁸ = 161116783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161378227) 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, 80689463 + 80689464.

It is an arithmetic number, because the mean of its divisors is an integer number (80689464).

Almost surely, 2^161378927 is an apocalyptic number.

161378927 is a deficient number, since it is larger than the sum of its proper divisors (1).

161378927 is an equidigital number, since it uses as much as digits as its factorization.

161378927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 161378927 is about 12703.5005805487. The cubic root of 161378927 is about 544.4386409103.

The spelling of 161378927 in words is "one hundred sixty-one million, three hundred seventy-eight thousand, nine hundred twenty-seven".