161406877 has 2 divisors, whose sum is σ = 161406878. Its totient is φ = 161406876.

The previous prime is 161406859. The next prime is 161406887. The reversal of 161406877 is 778604161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155226681 + 6180196 = 12459^2 + 2486^2 .

It is an emirp because it is prime and its reverse (778604161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161406877 is a prime.

It is a Chen prime.

It is equal to p_9048937 and since 161406877 and 9048937 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161406887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80703438 + 80703439.

It is an arithmetic number, because the mean of its divisors is an integer number (80703439).

Almost surely, 2^161406877 is an apocalyptic number.

It is an amenable number.

161406877 is a deficient number, since it is larger than the sum of its proper divisors (1).

161406877 is an equidigital number, since it uses as much as digits as its factorization.

161406877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 161406877 is about 12704.6006233962. The cubic root of 161406877 is about 544.4700704198.

The spelling of 161406877 in words is "one hundred sixty-one million, four hundred six thousand, eight hundred seventy-seven".