1623986397 has 24 divisors (see below), whose sum is σ = 2594075328. Its totient is φ = 970747200.

The previous prime is 1623986389. The next prime is 1623986417. The reversal of 1623986397 is 7936893261.

1623986397 is a `hidden beast` number, since 1 + 623 + 9 + 8 + 6 + 3 + 9 + 7 = 666.

It is not a de Polignac number, because 1623986397 - 2³ = 1623986389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623986317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105129 + ... + 119582.

It is an arithmetic number, because the mean of its divisors is an integer number (108086472).

Almost surely, 2^1623986397 is an apocalyptic number.

It is an amenable number.

1623986397 is a deficient number, since it is larger than the sum of its proper divisors (970088931).

1623986397 is a wasteful number, since it uses less digits than its factorization.

1623986397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224801 (or 224798 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 1623986397 is about 40298.7145824777. The cubic root of 1623986397 is about 1175.4228499525.

The spelling of 1623986397 in words is "one billion, six hundred twenty-three million, nine hundred eighty-six thousand, three hundred ninety-seven".