998265917 has 4 divisors (see below), whose sum is σ = 1089017376. Its totient is φ = 907514460.

The previous prime is 998265901. The next prime is 998265923. The reversal of 998265917 is 719562899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 998265917 - 2⁴ = 998265901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998465917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45375713 + ... + 45375734.

It is an arithmetic number, because the mean of its divisors is an integer number (272254344).

Almost surely, 2^998265917 is an apocalyptic number.

It is an amenable number.

998265917 is a deficient number, since it is larger than the sum of its proper divisors (90751459).

998265917 is a wasteful number, since it uses less digits than its factorization.

998265917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90751458.

The product of its digits is 2449440, while the sum is 56.

The square root of 998265917 is about 31595.3464453232. The cubic root of 998265917 is about 999.4216378951.

The spelling of 998265917 in words is "nine hundred ninety-eight million, two hundred sixty-five thousand, nine hundred seventeen".