1623443261 has 8 divisors (see below), whose sum is σ = 1771594848. Its totient is φ = 1475386000.

The previous prime is 1623443249. The next prime is 1623443267.

1623443261 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1623443261 - 2⁶ = 1623443197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623443267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15191 + ... + 58971.

It is an arithmetic number, because the mean of its divisors is an integer number (221449356).

Almost surely, 2^1623443261 is an apocalyptic number.

1623443261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1623443261 is a deficient number, since it is larger than the sum of its proper divisors (148151587).

1623443261 is a wasteful number, since it uses less digits than its factorization.

1623443261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47163.

The product of its digits is 20736, while the sum is 32.

The square root of 1623443261 is about 40291.9751439415. The cubic root of 1623443261 is about 1175.2917967920.

It can be divided in two parts, 16234 and 43261, that added together give a palindrome (59495).

The spelling of 1623443261 in words is "one billion, six hundred twenty-three million, four hundred forty-three thousand, two hundred sixty-one".