998456137 has 32 divisors (see below), whose sum is σ = 1243457280. Its totient is φ = 782576640.

The previous prime is 998456131. The next prime is 998456161. The reversal of 998456137 is 731654899.

It is a happy number.

It is not a de Polignac number, because 998456137 - 2¹⁵ = 998423369 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (998456131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673437 + ... + 674917.

It is an arithmetic number, because the mean of its divisors is an integer number (38858040).

Almost surely, 2^998456137 is an apocalyptic number.

It is an amenable number.

998456137 is a deficient number, since it is larger than the sum of its proper divisors (245001143).

998456137 is a wasteful number, since it uses less digits than its factorization.

998456137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its digits is 1632960, while the sum is 52.

The square root of 998456137 is about 31598.3565553653. The cubic root of 998456137 is about 999.4851139378.

The spelling of 998456137 in words is "nine hundred ninety-eight million, four hundred fifty-six thousand, one hundred thirty-seven".