161835287 has 2 divisors, whose sum is σ = 161835288. Its totient is φ = 161835286.

The previous prime is 161835277. The next prime is 161835301. The reversal of 161835287 is 782538161.

161835287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161835287 - 2⁸ = 161835031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161835227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80917643 + 80917644.

It is an arithmetic number, because the mean of its divisors is an integer number (80917644).

Almost surely, 2^161835287 is an apocalyptic number.

161835287 is a deficient number, since it is larger than the sum of its proper divisors (1).

161835287 is an equidigital number, since it uses as much as digits as its factorization.

161835287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 161835287 is about 12721.4498780603. The cubic root of 161835287 is about 544.9513600224.

The spelling of 161835287 in words is "one hundred sixty-one million, eight hundred thirty-five thousand, two hundred eighty-seven".