1097802257 has 4 divisors (see below), whose sum is σ = 1098646080. Its totient is φ = 1096958436.

The previous prime is 1097802227. The next prime is 1097802263. The reversal of 1097802257 is 7522087901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1097802257 - 2⁶ = 1097802193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1097802227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419957 + ... + 422562.

It is an arithmetic number, because the mean of its divisors is an integer number (274661520).

Almost surely, 2^1097802257 is an apocalyptic number.

It is an amenable number.

1097802257 is a deficient number, since it is larger than the sum of its proper divisors (843823).

1097802257 is an equidigital number, since it uses as much as digits as its factorization.

1097802257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843822.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 1097802257 is about 33133.0991155370. The cubic root of 1097802257 is about 1031.5921763706.

The spelling of 1097802257 in words is "one billion, ninety-seven million, eight hundred two thousand, two hundred fifty-seven".