161701087 has 2 divisors, whose sum is σ = 161701088. Its totient is φ = 161701086.

The previous prime is 161701081. The next prime is 161701157. The reversal of 161701087 is 780107161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161701087 - 2²³ = 153312479 is a prime.

It is a super-2 number, since 2×161701087² = 52294483073963138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161701081) 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, 80850543 + 80850544.

It is an arithmetic number, because the mean of its divisors is an integer number (80850544).

Almost surely, 2^161701087 is an apocalyptic number.

161701087 is a deficient number, since it is larger than the sum of its proper divisors (1).

161701087 is an equidigital number, since it uses as much as digits as its factorization.

161701087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 161701087 is about 12716.1742281238. The cubic root of 161701087 is about 544.8006868741.

The spelling of 161701087 in words is "one hundred sixty-one million, seven hundred one thousand, eighty-seven".