161107477 has 2 divisors, whose sum is σ = 161107478. Its totient is φ = 161107476.

The previous prime is 161107459. The next prime is 161107511. The reversal of 161107477 is 774701161.

It is an a-pointer prime, because the next prime (161107511) can be obtained adding 161107477 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130736356 + 30371121 = 11434^2 + 5511^2 .

It is a cyclic number.

It is not a de Polignac number, because 161107477 - 2¹¹ = 161105429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161107417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80553738 + 80553739.

It is an arithmetic number, because the mean of its divisors is an integer number (80553739).

Almost surely, 2^161107477 is an apocalyptic number.

It is an amenable number.

161107477 is a deficient number, since it is larger than the sum of its proper divisors (1).

161107477 is an equidigital number, since it uses as much as digits as its factorization.

161107477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 34.

The square root of 161107477 is about 12692.8120209826. The cubic root of 161107477 is about 544.1332090253.

The spelling of 161107477 in words is "one hundred sixty-one million, one hundred seven thousand, four hundred seventy-seven".