1623273201 has 18 divisors (see below), whose sum is σ = 2577264690. Its totient is φ = 983801280.

The previous prime is 1623273161. The next prime is 1623273209. The reversal of 1623273201 is 1023723261.

1623273201 is a `hidden beast` number, since 1 + 623 + 2 + 7 + 32 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1620867600 + 2405601 = 40260^2 + 1551^2 .

It is not a de Polignac number, because 1623273201 - 2⁷ = 1623273073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1623273209) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 744216 + ... + 746393.

Almost surely, 2^1623273201 is an apocalyptic number.

1623273201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1623273201 is a deficient number, since it is larger than the sum of its proper divisors (953991489).

1623273201 is a wasteful number, since it uses less digits than its factorization.

1623273201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490637 (or 1490623 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1623273201 is about 40289.8647428854. The cubic root of 1623273201 is about 1175.2507570449.

Adding to 1623273201 its reverse (1023723261), we get a palindrome (2646996462).

The spelling of 1623273201 in words is "one billion, six hundred twenty-three million, two hundred seventy-three thousand, two hundred one".