161247887 has 8 divisors (see below), whose sum is σ = 167941152. Its totient is φ = 154677600.

The previous prime is 161247829. The next prime is 161247953. The reversal of 161247887 is 788742161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161247887 - 2¹² = 161243791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161247817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28064 + ... + 33317.

It is an arithmetic number, because the mean of its divisors is an integer number (20992644).

Almost surely, 2^161247887 is an apocalyptic number.

161247887 is a deficient number, since it is larger than the sum of its proper divisors (6693265).

161247887 is an equidigital number, since it uses as much as digits as its factorization.

161247887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61489.

The product of its digits is 150528, while the sum is 44.

The square root of 161247887 is about 12698.3418996340. The cubic root of 161247887 is about 544.2912392641.

The spelling of 161247887 in words is "one hundred sixty-one million, two hundred forty-seven thousand, eight hundred eighty-seven".