1642622023 has 4 divisors (see below), whose sum is σ = 1877282320. Its totient is φ = 1407961728.

The previous prime is 1642622021. The next prime is 1642622053. The reversal of 1642622023 is 3202262461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3202262461 = 30319 ⋅105619.

It is a cyclic number.

It is not a de Polignac number, because 1642622023 - 2¹ = 1642622021 is a prime.

It is a super-2 number, since 2×1642622023² = 5396414220889225058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1642621982 and 1642622000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642622021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117330138 + ... + 117330151.

It is an arithmetic number, because the mean of its divisors is an integer number (469320580).

Almost surely, 2^1642622023 is an apocalyptic number.

1642622023 is a deficient number, since it is larger than the sum of its proper divisors (234660297).

1642622023 is an equidigital number, since it uses as much as digits as its factorization.

1642622023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234660296.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1642622023 is about 40529.2736549768. The cubic root of 1642622023 is about 1179.9018454696.

Adding to 1642622023 its reverse (3202262461), we get a palindrome (4844884484).

The spelling of 1642622023 in words is "one billion, six hundred forty-two million, six hundred twenty-two thousand, twenty-three".