1002143623 has 4 divisors (see below), whose sum is σ = 1079231608. Its totient is φ = 925055640.

The previous prime is 1002143621. The next prime is 1002143627. The reversal of 1002143623 is 3263412001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002143623 - 2¹ = 1002143621 is a prime.

It is a super-3 number, since 3×1002143623³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1002143594 and 1002143603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002143621) 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, 38543973 + ... + 38543998.

It is an arithmetic number, because the mean of its divisors is an integer number (269807902).

Almost surely, 2^1002143623 is an apocalyptic number.

1002143623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1002143623 is a deficient number, since it is larger than the sum of its proper divisors (77087985).

1002143623 is an equidigital number, since it uses as much as digits as its factorization.

1002143623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77087984.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1002143623 is about 31656.6521129446. The cubic root of 1002143623 is about 1000.7140310383.

Adding to 1002143623 its reverse (3263412001), we get a palindrome (4265555624).

The spelling of 1002143623 in words is "one billion, two million, one hundred forty-three thousand, six hundred twenty-three".