1097857406 has 4 divisors (see below), whose sum is σ = 1646786112. Its totient is φ = 548928702.

The previous prime is 1097857403. The next prime is 1097857417. The reversal of 1097857406 is 6047587901.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097857403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274464350 + ... + 274464353.

It is an arithmetic number, because the mean of its divisors is an integer number (411696528).

Almost surely, 2^1097857406 is an apocalyptic number.

1097857406 is a deficient number, since it is larger than the sum of its proper divisors (548928706).

1097857406 is an equidigital number, since it uses as much as digits as its factorization.

1097857406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548928705.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 1097857406 is about 33133.9313393385. The cubic root of 1097857406 is about 1031.6094503754.

The spelling of 1097857406 in words is "one billion, ninety-seven million, eight hundred fifty-seven thousand, four hundred six".