998131753 has 4 divisors (see below), whose sum is σ = 1001815168. Its totient is φ = 994448340.

The previous prime is 998131723. The next prime is 998131777. The reversal of 998131753 is 357131899.

It is a happy number.

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 998131753 - 2⁹ = 998131241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998131723) 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, 1841301 + ... + 1841842.

It is an arithmetic number, because the mean of its divisors is an integer number (250453792).

Almost surely, 2^998131753 is an apocalyptic number.

It is an amenable number.

998131753 is a deficient number, since it is larger than the sum of its proper divisors (3683415).

998131753 is a wasteful number, since it uses less digits than its factorization.

998131753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683414.

The product of its digits is 204120, while the sum is 46.

The square root of 998131753 is about 31593.2232132146. The cubic root of 998131753 is about 999.3768627807.

The spelling of 998131753 in words is "nine hundred ninety-eight million, one hundred thirty-one thousand, seven hundred fifty-three".