161377 has 2 divisors, whose sum is σ = 161378. Its totient is φ = 161376.

The previous prime is 161363. The next prime is 161387. The reversal of 161377 is 773161.

161377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160801 + 576 = 401^2 + 24^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161377 is a prime.

It is a super-2 number, since 2×161377² = 52085072258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80688 + 80689.

It is an arithmetic number, because the mean of its divisors is an integer number (80689).

2¹⁶¹³⁷⁷ is an apocalyptic number.

It is an amenable number.

161377 is a deficient number, since it is larger than the sum of its proper divisors (1).

161377 is an equidigital number, since it uses as much as digits as its factorization.

161377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882, while the sum is 25.

The square root of 161377 is about 401.7175624739. The cubic root of 161377 is about 54.4436473883.

The spelling of 161377 in words is "one hundred sixty-one thousand, three hundred seventy-seven".