623772982849 has 3 divisors (see below), whose sum is σ = 623773772643. Its totient is φ = 623772193056.

The previous prime is 623772982841. The next prime is 623772982883. The reversal of 623772982849 is 948289277326.

The square root of 623772982849 is 789793.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 948289277326 = 2 ⋅474144638663.

It can be written as a sum of positive squares in only one way, i.e., 118490850625 + 505282132224 = 344225^2 + 710832^2 .

It is not a de Polignac number, because 623772982849 - 2³ = 623772982841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623772982841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 394897 + ... + 1184689.

It is an arithmetic number, because the mean of its divisors is an integer number (207924590881).

Almost surely, 2^623772982849 is an apocalyptic number.

623772982849 is the 789793-rd square number.

623772982849 is the 394897-th centered octagonal number.

It is an amenable number.

623772982849 is a deficient number, since it is larger than the sum of its proper divisors (789794).

623772982849 is an frugal number, since it uses more digits than its factorization.

623772982849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579586 (or 789793 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 67.

The spelling of 623772982849 in words is "six hundred twenty-three billion, seven hundred seventy-two million, nine hundred eighty-two thousand, eight hundred forty-nine".