998681237 has 4 divisors (see below), whose sum is σ = 1000235040. Its totient is φ = 997127436.

The previous prime is 998681227. The next prime is 998681261. The reversal of 998681237 is 732186899.

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 998681237 - 2¹⁰ = 998680213 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 (998681227) 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, 775937 + ... + 777222.

It is an arithmetic number, because the mean of its divisors is an integer number (250058760).

Almost surely, 2^998681237 is an apocalyptic number.

It is an amenable number.

998681237 is a deficient number, since it is larger than the sum of its proper divisors (1553803).

998681237 is a wasteful number, since it uses less digits than its factorization.

998681237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553802.

The product of its digits is 1306368, while the sum is 53.

The square root of 998681237 is about 31601.9182487393. The cubic root of 998681237 is about 999.5602189543.

The spelling of 998681237 in words is "nine hundred ninety-eight million, six hundred eighty-one thousand, two hundred thirty-seven".