998730919 has 2 divisors, whose sum is σ = 998730920. Its totient is φ = 998730918.

The previous prime is 998730917. The next prime is 998730983. The reversal of 998730919 is 919037899.

998730919 = T₂₅₈₀₂ + T₂₅₈₀₃ + T₂₅₈₀₄.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998730919 - 2¹ = 998730917 is a prime.

It is a super-2 number, since 2×998730919² = 1994926897133169122, which contains 22 as substring.

Together with 998730917, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 998730919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998730917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499365459 + 499365460.

It is an arithmetic number, because the mean of its divisors is an integer number (499365460).

Almost surely, 2^998730919 is an apocalyptic number.

998730919 is the 25804-th centered triangular number.

998730919 is a deficient number, since it is larger than the sum of its proper divisors (1).

998730919 is an equidigital number, since it uses as much as digits as its factorization.

998730919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 998730919 is about 31602.7042988413. The cubic root of 998730919 is about 999.5767939219.

The spelling of 998730919 in words is "nine hundred ninety-eight million, seven hundred thirty thousand, nine hundred nineteen".