998723623 has 2 divisors, whose sum is σ = 998723624. Its totient is φ = 998723622.

The previous prime is 998723597. The next prime is 998723639. The reversal of 998723623 is 326327899.

998723623 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 is a cyclic number.

It is not a de Polignac number, because 998723623 - 2⁵ = 998723591 is a prime.

It is a super-2 number, since 2×998723623² = 1994897750276492258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998723423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499361811 + 499361812.

It is an arithmetic number, because the mean of its divisors is an integer number (499361812).

Almost surely, 2^998723623 is an apocalyptic number.

998723623 is a deficient number, since it is larger than the sum of its proper divisors (1).

998723623 is an equidigital number, since it uses as much as digits as its factorization.

998723623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 998723623 is about 31602.5888654711. The cubic root of 998723623 is about 999.5743598562.

The spelling of 998723623 in words is "nine hundred ninety-eight million, seven hundred twenty-three thousand, six hundred twenty-three".