1623042369 has 27 divisors (see below), whose sum is σ = 2541064617. Its totient is φ = 997828416.

The previous prime is 1623042367. The next prime is 1623042383. The reversal of 1623042369 is 9632403261.

The square root of 1623042369 is 40287.

It is a perfect power (a square), and thus also a powerful number.

1623042369 is a `hidden beast` number, since 1 + 623 + 0 + 4 + 23 + 6 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 69105969 + 1553936400 = 8313^2 + 39420^2 .

It is not a de Polignac number, because 1623042369 - 2¹ = 1623042367 is a prime.

It is a super-2 number, since 2×1623042369² = 5268533063138264322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1623042367) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1570677 + ... + 1571709.

Almost surely, 2^1623042369 is an apocalyptic number.

1623042369 is the 40287-th square number.

1623042369 is the 20144-th centered octagonal number.

It is an amenable number.

1623042369 is a deficient number, since it is larger than the sum of its proper divisors (918022248).

1623042369 is an equidigital number, since it uses as much as digits as its factorization.

1623042369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The cubic root of 1623042369 is about 1175.1950469027.

Multiplying 1623042369 by its sum of digits (36), we get a square (58429525284 = 241722²).

Multiplying 1623042369 by its product of nonzero digits (46656), we get a square (75724664768064 = 8701992²).

The spelling of 1623042369 in words is "one billion, six hundred twenty-three million, forty-two thousand, three hundred sixty-nine".