1642863623 has 2 divisors, whose sum is σ = 1642863624. Its totient is φ = 1642863622.

The previous prime is 1642863583. The next prime is 1642863643. The reversal of 1642863623 is 3263682461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642863623 - 2⁶ = 1642863559 is a prime.

It is a super-2 number, since 2×1642863623² = 5398001767553372258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642863643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821431811 + 821431812.

It is an arithmetic number, because the mean of its divisors is an integer number (821431812).

Almost surely, 2^1642863623 is an apocalyptic number.

1642863623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642863623 is an equidigital number, since it uses as much as digits as its factorization.

1642863623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 41.

The square root of 1642863623 is about 40532.2541070689. The cubic root of 1642863623 is about 1179.9596900431.

The spelling of 1642863623 in words is "one billion, six hundred forty-two million, eight hundred sixty-three thousand, six hundred twenty-three".