161622887 has 8 divisors (see below), whose sum is σ = 167637600. Its totient is φ = 155637664.

The previous prime is 161622869. The next prime is 161622907. The reversal of 161622887 is 788226161.

161622887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161622887 - 2⁶ = 161622823 is a prime.

It is a super-2 number, since 2×161622887² = 52243915204429538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161622847) 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, 4118 + ... + 18444.

It is an arithmetic number, because the mean of its divisors is an integer number (20954700).

Almost surely, 2^161622887 is an apocalyptic number.

161622887 is a deficient number, since it is larger than the sum of its proper divisors (6014713).

161622887 is a wasteful number, since it uses less digits than its factorization.

161622887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14745.

The product of its digits is 64512, while the sum is 41.

The square root of 161622887 is about 12713.0990321007. The cubic root of 161622887 is about 544.7128493212.

The spelling of 161622887 in words is "one hundred sixty-one million, six hundred twenty-two thousand, eight hundred eighty-seven".