161037287 has 2 divisors, whose sum is σ = 161037288. Its totient is φ = 161037286.

The previous prime is 161037271. The next prime is 161037337. The reversal of 161037287 is 782730161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161037287 - 2⁴ = 161037271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161037587) 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, 80518643 + 80518644.

It is an arithmetic number, because the mean of its divisors is an integer number (80518644).

Almost surely, 2^161037287 is an apocalyptic number.

161037287 is a deficient number, since it is larger than the sum of its proper divisors (1).

161037287 is an equidigital number, since it uses as much as digits as its factorization.

161037287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 161037287 is about 12690.0467690234. The cubic root of 161037287 is about 544.0541763645.

The spelling of 161037287 in words is "one hundred sixty-one million, thirty-seven thousand, two hundred eighty-seven".