90849796497 has 6 divisors (see below), whose sum is σ = 131227483842. Its totient is φ = 60566530992.

The previous prime is 90849796483. The next prime is 90849796511. The reversal of 90849796497 is 79469794809.

90849796497 is a `hidden beast` number, since 9 + 0 + 8 + 49 + 7 + 96 + 497 = 666.

It is an interprime number because it is at equal distance from previous prime (90849796483) and next prime (90849796511).

It can be written as a sum of positive squares in only one way, i.e., 66126636801 + 24723159696 = 257151^2 + 157236^2 .

It is not a de Polignac number, because 90849796497 - 2¹⁹ = 90849272209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90849796097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5047210908 + ... + 5047210925.

It is an arithmetic number, because the mean of its divisors is an integer number (21871247307).

Almost surely, 2^90849796497 is an apocalyptic number.

It is an amenable number.

90849796497 is a deficient number, since it is larger than the sum of its proper divisors (40377687345).

90849796497 is a wasteful number, since it uses less digits than its factorization.

90849796497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10094421839 (or 10094421836 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 72.

Adding to 90849796497 its sum of digits (72), we get a square (90849796569 = 301413²).

The spelling of 90849796497 in words is "ninety billion, eight hundred forty-nine million, seven hundred ninety-six thousand, four hundred ninety-seven".