161041687 has 2 divisors, whose sum is σ = 161041688. Its totient is φ = 161041686.

The previous prime is 161041667. The next prime is 161041691. The reversal of 161041687 is 786140161.

161041687 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 is a cyclic number.

It is not a de Polignac number, because 161041687 - 2¹⁵ = 161008919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161041627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80520843 + 80520844.

It is an arithmetic number, because the mean of its divisors is an integer number (80520844).

Almost surely, 2^161041687 is an apocalyptic number.

161041687 is a deficient number, since it is larger than the sum of its proper divisors (1).

161041687 is an equidigital number, since it uses as much as digits as its factorization.

161041687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 161041687 is about 12690.2201320544. The cubic root of 161041687 is about 544.0591313589.

The spelling of 161041687 in words is "one hundred sixty-one million, forty-one thousand, six hundred eighty-seven".