1097980825 has 6 divisors (see below), whose sum is σ = 1361496254. Its totient is φ = 878384640.

The previous prime is 1097980811. The next prime is 1097980837. The reversal of 1097980825 is 5280897901.

It can be written as a sum of positive squares in 3 ways, for example, as 292102281 + 805878544 = 17091^2 + 28388^2 .

It is not a de Polignac number, because 1097980825 - 2⁹ = 1097980313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21959592 + ... + 21959641.

Almost surely, 2^1097980825 is an apocalyptic number.

It is an amenable number.

1097980825 is a deficient number, since it is larger than the sum of its proper divisors (263515429).

1097980825 is an equidigital number, since it uses as much as digits as its factorization.

1097980825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43919243 (or 43919238 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 1097980825 is about 33135.7937131435. The cubic root of 1097980825 is about 1031.6481061047.

The spelling of 1097980825 in words is "one billion, ninety-seven million, nine hundred eighty thousand, eight hundred twenty-five".