623345012281 has 2 divisors, whose sum is σ = 623345012282. Its totient is φ = 623345012280.

The previous prime is 623345012201. The next prime is 623345012309. The reversal of 623345012281 is 182210543326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362423264256 + 260921748025 = 602016^2 + 510805^2 .

It is a cyclic number.

It is not a de Polignac number, because 623345012281 - 2²⁵ = 623311457849 is a prime.

It is a super-2 number, since 2×623345012281² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 623345012281.

It is not a weakly prime, because it can be changed into another prime (623345012201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311672506140 + 311672506141.

It is an arithmetic number, because the mean of its divisors is an integer number (311672506141).

Almost surely, 2^623345012281 is an apocalyptic number.

It is an amenable number.

623345012281 is a deficient number, since it is larger than the sum of its proper divisors (1).

623345012281 is an equidigital number, since it uses as much as digits as its factorization.

623345012281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 623345012281 in words is "six hundred twenty-three billion, three hundred forty-five million, twelve thousand, two hundred eighty-one".