1097665401 has 32 divisors (see below), whose sum is σ = 1808732160. Its totient is φ = 577771776.

The previous prime is 1097665381. The next prime is 1097665403. The reversal of 1097665401 is 1045667901.

It is not a de Polignac number, because 1097665401 - 2⁶ = 1097665337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1097665401.

It is not an unprimeable number, because it can be changed into a prime (1097665403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15931 + ... + 49488.

It is an arithmetic number, because the mean of its divisors is an integer number (56522880).

Almost surely, 2^1097665401 is an apocalyptic number.

It is an amenable number.

1097665401 is a deficient number, since it is larger than the sum of its proper divisors (711066759).

1097665401 is a wasteful number, since it uses less digits than its factorization.

1097665401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65493.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1097665401 is about 33131.0338051803. The cubic root of 1097665401 is about 1031.5493072519.

The spelling of 1097665401 in words is "one billion, ninety-seven million, six hundred sixty-five thousand, four hundred one".