4001126623 has 4 divisors (see below), whose sum is σ = 4308905608. Its totient is φ = 3693347640.

The previous prime is 4001126599. The next prime is 4001126627. The reversal of 4001126623 is 3266211004.

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 4001126623 - 2²¹ = 3999029471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001126627) 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, 153889473 + ... + 153889498.

It is an arithmetic number, because the mean of its divisors is an integer number (1077226402).

Almost surely, 2^4001126623 is an apocalyptic number.

4001126623 is a deficient number, since it is larger than the sum of its proper divisors (307778985).

4001126623 is a wasteful number, since it uses less digits than its factorization.

4001126623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307778984.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 4001126623 is about 63254.4593131583. The cubic root of 4001126623 is about 1587.5500715230.

Adding to 4001126623 its reverse (3266211004), we get a palindrome (7267337627).

The spelling of 4001126623 in words is "four billion, one million, one hundred twenty-six thousand, six hundred twenty-three".