999403453 has 2 divisors, whose sum is σ = 999403454. Its totient is φ = 999403452.

The previous prime is 999403421. The next prime is 999403469. The reversal of 999403453 is 354304999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 835614649 + 163788804 = 28907^2 + 12798^2 .

It is a cyclic number.

It is not a de Polignac number, because 999403453 - 2⁵ = 999403421 is a prime.

It is equal to p_50818978 and since 999403453 and 50818978 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999401453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499701726 + 499701727.

It is an arithmetic number, because the mean of its divisors is an integer number (499701727).

Almost surely, 2^999403453 is an apocalyptic number.

It is an amenable number.

999403453 is a deficient number, since it is larger than the sum of its proper divisors (1).

999403453 is an equidigital number, since it uses as much as digits as its factorization.

999403453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 46.

The square root of 999403453 is about 31613.3429583143. The cubic root of 999403453 is about 999.8011114460.

The spelling of 999403453 in words is "nine hundred ninety-nine million, four hundred three thousand, four hundred fifty-three".