1622105987 has 4 divisors (see below), whose sum is σ = 1623219240. Its totient is φ = 1620992736.

The previous prime is 1622105963. The next prime is 1622106007. The reversal of 1622105987 is 7895012261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7895012261 = 887 ⋅8900803.

It is a cyclic number.

It is not a de Polignac number, because 1622105987 - 2⁸ = 1622105731 is a prime.

It is a super-2 number, since 2×1622105987² = 5262455666122488338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622105587) 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 in 3 ways as a sum of consecutive naturals, for example, 554438 + ... + 557355.

It is an arithmetic number, because the mean of its divisors is an integer number (405804810).

Almost surely, 2^1622105987 is an apocalyptic number.

1622105987 is a deficient number, since it is larger than the sum of its proper divisors (1113253).

1622105987 is a wasteful number, since it uses less digits than its factorization.

1622105987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113252.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1622105987 is about 40275.3769318178. The cubic root of 1622105987 is about 1174.9690016268.

The spelling of 1622105987 in words is "one billion, six hundred twenty-two million, one hundred five thousand, nine hundred eighty-seven".