1097539794 has 80 divisors (see below), whose sum is σ = 2698724952. Its totient is φ = 331299072.

The previous prime is 1097539789. The next prime is 1097539801. The reversal of 1097539794 is 4979357901.

It is a happy number.

1097539794 is a `hidden beast` number, since 10 + 9 + 7 + 539 + 7 + 94 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 878351769 + 219188025 = 29637^2 + 14805^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1097539794.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 106702 + ... + 116534.

Almost surely, 2^1097539794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097539794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349362476).

1097539794 is an abundant number, since it is smaller than the sum of its proper divisors (1601185158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1097539794 is a wasteful number, since it uses less digits than its factorization.

1097539794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9913 (or 9904 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The square root of 1097539794 is about 33129.1381415213. The cubic root of 1097539794 is about 1031.5099586622.

The spelling of 1097539794 in words is "one billion, ninety-seven million, five hundred thirty-nine thousand, seven hundred ninety-four".