999923120453 has 2 divisors, whose sum is σ = 999923120454. Its totient is φ = 999923120452.

The previous prime is 999923120311. The next prime is 999923120507. The reversal of 999923120453 is 354021329999.

It is a happy number.

999923120453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716795903044 + 283127217409 = 846638^2 + 532097^2 .

It is an emirp because it is prime and its reverse (354021329999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999923120453 - 2¹⁴ = 999923104069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999923120753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499961560226 + 499961560227.

It is an arithmetic number, because the mean of its divisors is an integer number (499961560227).

Almost surely, 2^999923120453 is an apocalyptic number.

It is an amenable number.

999923120453 is a deficient number, since it is larger than the sum of its proper divisors (1).

999923120453 is an equidigital number, since it uses as much as digits as its factorization.

999923120453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4723920, while the sum is 56.

The spelling of 999923120453 in words is "nine hundred ninety-nine billion, nine hundred twenty-three million, one hundred twenty thousand, four hundred fifty-three".