998740477293 has 16 divisors (see below), whose sum is σ = 1434300073920. Its totient is φ = 614519017344.

The previous prime is 998740477289. The next prime is 998740477307. The reversal of 998740477293 is 392774047899.

It is not a de Polignac number, because 998740477293 - 2² = 998740477289 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998740477213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1616848 + ... + 2147481.

It is an arithmetic number, because the mean of its divisors is an integer number (89643754620).

Almost surely, 2^998740477293 is an apocalyptic number.

It is an amenable number.

998740477293 is a deficient number, since it is larger than the sum of its proper divisors (435559596627).

998740477293 is a wasteful number, since it uses less digits than its factorization.

998740477293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771148.

The product of its (nonzero) digits is 192036096, while the sum is 69.

The spelling of 998740477293 in words is "nine hundred ninety-eight billion, seven hundred forty million, four hundred seventy-seven thousand, two hundred ninety-three".