998805470807 has 2 divisors, whose sum is σ = 998805470808. Its totient is φ = 998805470806.

The previous prime is 998805470759. The next prime is 998805470851. The reversal of 998805470807 is 708074508899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998805470807 - 2²⁸ = 998537035351 is a prime.

It is a super-2 number, since 2×998805470807² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998805470407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499402735403 + 499402735404.

It is an arithmetic number, because the mean of its divisors is an integer number (499402735404).

Almost surely, 2^998805470807 is an apocalyptic number.

998805470807 is a deficient number, since it is larger than the sum of its proper divisors (1).

998805470807 is an equidigital number, since it uses as much as digits as its factorization.

998805470807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40642560, while the sum is 65.

The spelling of 998805470807 in words is "nine hundred ninety-eight billion, eight hundred five million, four hundred seventy thousand, eight hundred seven".